Star Trek: Hidden Gems

A Star Trek-themed spoiler warning

Spoiler Warning: Beware of minor spoilers for some of the episodes on this list.

In celebration of Star Trek’s imminent sixtieth anniversary, I want to make a list of some great episodes! And I know what you’re thinking: “Dennis, you’ve done this before.” True. But this list is slightly different – I’m going to exclusively focus on episodes that I think are “hidden gems;” episodes you might overlook, episodes you might skip if you’re going back for your sixtieth re-watch of a box set, and episodes that basically no Trekkie is recommending as a starting point for new viewers of the franchise!

So that raises an obvious question, right? How do we determine what is and is not a “hidden gem?” I’m glad you asked!

Last year, I used IMDB’s episode review scores to put together two lists: the “top five” and “bottom five” episodes from each of the pre-Discovery shows. And I’m taking IMDB’s rankings as a starting point again. In short: if an episode is either in the top ten most highly-rated episodes, or the bottom ten most-disliked episodes from a series, I’m excluding it. That also applies if one half of a two-part story is in either the top- or bottom-ten. But the rules don’t end there!

I’m also going to exclude stories that are – in my *subjective opinion*, of course – well-remembered, “iconic,” or that have otherwise crossed over to become part of pop culture. In brief: episodes everyone remembers, stories with clips or scenes that have been meme-ified, and really any episode that I think an average non-Trekkie might look at and say “oh, I remember that.” I think that definition *has* to include series premieres and finales, which introduce characters and wrap up key storylines. And finally, I’m going to exclude crossover episodes, which I think are pretty memorable by default.

So that’s how we’re reaching our conclusion for what is and is not a hidden gem! Partly based on review scores from IMDB, and partly based on how subjectively “iconic,” easily-recognised, or memed on an episode might be.

Does that sound fair? I hope so, because that’s what we’re going with!

Behind-the-scenes photo from Star Trek TNG
Behind-the-scenes on the set of Star Trek: The Next Generation.

What’s the point of this? Well, I want to celebrate the franchise’s sixtieth anniversary, but I think there are gonna be a ton of “bEzT sTaR tReK ePiSoDeZ eVaRrR!!1!” list-icles all over the internet this week, and many of them are gonna just pick the same fan-favourites: City on the Edge of Forever, The Best of Both Worlds, and so on. And likewise, some folks are gonna ironically recommend the likes of Spock’s Brain or Shades of Gray.

I just thought it could be fun to pick out a few episodes that might fly under the radar; genuinely good, enjoyable stories that might’ve been eclipsed by stronger episodes, or that just didn’t catch fire in the way some others did.

Still frame from Star Trek TOS showing Kirk and his phaser rifle
Captain Kirk.

I’m not putting any other limitations on my selections. Episodes will come from right across the franchise, and as long as they aren’t in the top- or bottom-ten from their respective shows, and don’t have iconic moments, famous memes, or other such things… they’ll be entered into consideration! I hope this’ll be a bit of fun, and maybe you’ll be inspired to return to a story you haven’t seen in a while, or even try out something brand-new.

I’ve picked fifteen episodes for this list… and hey, if you’re looking for a playlist for your sixtieth anniversary Star Trek marathon? Here ya go!

With all of that out of the way, let’s get into the episodes!

Episode #1:
The Star Gazer
Picard Season 2, Episode 1

Still frame from Star Trek PIC 2x01 showing Picard
Picard gives a speech.

Star Trek: Picard is awkward for this list, because at only thirty episodes in total, two-thirds of the entire series is excluded by default! But of the ten episodes in the middle, The Star Gazer leapt out at me. In my review of the episode from back in 2022, I described it as “one of the best episodes of live-action Star Trek that I’ve seen in a long time,” and I stand by that… with a caveat or two! After a disappointing end to Season 1, The Star Gazer took Picard and his new friends back to Starfleet in a big way, and not only that, but it reintroduced a villainous faction by giving them a truly terrifying new look.

After that, though… well, Season 2 kinda went off the rails! And as the first chapter of a ten-episode story, The Star Gazer isn’t gonna be the easiest thing to watch in isolation. The subsequent nine episodes put a pretty big downer on it, and that’s just unavoidable. If you can enjoy it on its own merits, though, I think there’s a lot to love here. A new version of an iconic starship, Picard seemingly back to his old self, and an updated take on one of the franchise’s biggest baddies that, at the time, I found to be genuinely shocking and quite frightening.

Episode #2:
The Maquis, Parts I-II
Deep Space Nine Season 2, Episodes 20-21

(AI upscaled) still frame from Star Trek DS9 2x21 showing Sisko
Commander Sisko.

DS9 has a ton of classic episodes, particularly involving Sisko, Garak, the Dominion War, and more. But if we’re looking for the real hidden gems, I want to pick out The Maquis. I think it’s an important episode – but one that’s easily overlooked both within DS9 itself and within the broader category of stories featuring the titular faction.

This was the episode that first introduced us to the Maquis – a faction that would reappear in DS9 as well as in The Next Generation and, of course, in Voyager. But being the first to establish an important faction is meaningless if the story isn’t good – and for me, at least, The Maquis has a solid, enjoyable story that really calls into question some of the Federation’s lofty ideals, and puts Sisko to the test. Star Trek has always done stories with big moral questions, and The Maquis absolutely fits in with the best of them.

Episode #3:
Off-Hour
Strange New Worlds Season 4, Episode 6

Still frame from Star Trek SNW 4x06 showing A'Sha opening the turbolift doors
Here’s A’Sha!

Call this “recency bias” all you want, but Off-Hour is a solid and very “Star Trekky” episode in a season that, to be honest, has had more misses than hits. So I’m glad to be able to recommend at least one episode from Strange New Worlds’ fourth season, which, at time of writing, hasn’t yet concluded! Off-Hour is kind of an updated take on The Next Generation’s Disaster, putting the ship and crew into a dangerous situation and forcing several characters to work miracles to keep everyone alive.

The episode gave most of the show’s main characters something to do, meaning it feels more of an ensemble piece than a lot of modern Star Trek stories. Its core premise was suitably tense – even if that tension, for me, could’ve been dialled back a notch or two! And after quite a few Strange New Worlds episodes have notoriously taken “big swings” into a variety of different genre parodies and spoofs… it was just nice to get an episode that felt very much like Star Trek. If you dipped out of Strange New Worlds after the musical or the puppet episode… come back for one more try! I don’t think you’ll regret it.

Episode #4:
The Ultimate Computer
The Original Series Season 2, Episode 24

Still frame from Star Trek TOS 2x24 showing Kirk, Spock, McCoy, and Daystrom
Dr Daystrom with Dr McCoy, Spock, and Kirk.

I had a hard time with TOS! So many episodes are either flat-out iconic in their own rights, or else they have incredibly memorable scenes or clips that I think would disqualify them from this list! But of all the episodes outside of the top-ten, The Ultimate Computer really stands out to me. What’s more, I think its core message and theming is *incredibly* relevant in 2026, some fifty-eight years after its original broadcast, as the world struggles with the rise of advanced A.I. systems and large-language models.

The Ultimate Computer is a “man versus machine” story, and a tale of how overreliance on technology can go horribly wrong. TOS made many “predictions” that have since come to pass: technologies like mobile phones, video calling, computer libraries storing all of human knowledge, wireless technology, iPads, real-time translation… the list goes on! But this depiction of a rogue A.I. feels like a timeless warning from the past, and given where we are today… it’s uncanny.

Episode #5:
Face the Strange
Discovery Season 5, Episode 4

Still frame from Star Trek DIS 5x04 showing Burnham and Rayner
Burnham and Rayner.

I did not care for Discovery’s fifth and final season, on the whole. But one real hidden gem amidst a generally disappointing story is Face the Strange, which sees Burnham and her new XO – Commander Rayner – forced to work together in the face of a weird time travel plot. Time travel is *also* not one of my favourite parts of Star Trek, usually, but I’m making an exception for the creative way it was utilised in Face the Strange.

Face the Strange feels like a bit of a diversion from the season’s bland and uninspired main storyline, which perhaps helps it stand out just a little bit more. I also enjoy the way Rayner comes across in this episode – as a relatively late addition to Discovery’s cast, Rayner needed the extra screen time that an episode like Face the Strange granted him. Again, an episode to try out if you had already checked out of Discovery before the fifth season.

Episode #6:
The Royale
The Next Generation Season 2, Episode 12

Still frame from Star Trek TNG The Royale showing the Enterprise-D and Theta VIII
The Enterprise-D.

This is, admittedly, pure bias on my part: The Royale is the first episode of Star Trek that I can remember watching, all the way back in 1991! But hey, if this is the episode that turned me into a Trekkie, it can’t be that bad, right? I like the episode’s away mission plot, I like that this kind of sci-fi mystery is something silly and weird that only a Star Trek show would dare attempt, and I like the way the episode handles the characters on the planet and back on the ship. Is it purely a nostalgic pick for me? Maybe. But that doesn’t make it bad!

The Royale uses its setting well, and although the characters on the planet feel like cardboard cut-outs for the most part, the episode explains why this is – and even has time to consider the idea of a very different kind of alien life trying to make sense of humanity through our literature and art. There are some genuinely fun moments for the away team, as they explore a weird, almost surreal 20th Century setting that they weren’t expecting to find, and back on the ship, Picard and the crew work hard to help them. A solid, enjoyable, and easily-overlooked episode.

Episode #7:
Macrocosm
Voyager Season 3, Episode 12

Still frame from Star Trek VOY showing Janeway and the Doctor in sickbat
The Doctor treating Captain Janeway.

Macrocosm sees Janeway and the Doctor fighting giant single-celled viruses that have taken over the ship! Cool, right? After an away mission goes awry and the ship is infected, it’s up to Janeway to save the day in what is genuinely one of the best action-packed storylines she gets across the show’s entire run. It’s a nice, self-contained story featuring a one-off alien race, a one-off antagonist, and a silly premise that has just enough of a basis in real science to make the technobabble seem believable!

There’s enough of a threat to Voyager that everyone feels in real danger, and while I will admit that the CGI macro-viruses probably haven’t aged especially well, there can be a charm to this kind of thing! I like when Star Trek depicts alien races that aren’t just part of the “nose and forehead brigade,” and these flying mega-viruses definitely fit the bill. A great episode if you want to see Janeway running around with a phaser, and the Doctor gets a moment to shine, too.

Episode #8:
Where Pleasant Fountains Lie
Lower Decks Season 2, Episode 7

Still frame from Star Trek LDS 2x07 showing Billups
Andy Billups.

I really need to get caught up on Lower Decks. Maybe you think this ruins my standing as a Trekkie, but I’ve only seen up to partway through Season 3 at time of writing! But of the episodes I’ve seen (that meet the criteria for this list), Where Pleasant Fountains Lie was the one I wanted to highlight the most.

I read part of the episode’s story – involving the USS Cerritos’ chief engineer, Andy Billups – as a metaphor for asexuality. Doing what Star Trek has always done, Lower Decks uses a sci-fi lens to shine a light on a real-world situation, and puts Billups in a difficult situation as he struggles with “fitting in” with his people. There’s plenty of comedy, and I think it’s also an interesting take on how some human societies exist outside of the Federation, which adds a bit of depth to the world of Star Trek. But it’s really that core message that I find the most interesting and relatable.

Episode #9:
The Catwalk
Enterprise Season 2, Episode 12

Still frame from Star Trek ENT showing Reed and Phlox in the catwalk
Reed and Dr Phlox in the titular catwalk.

Few episodes really manage to convey the dangers of pushing the frontiers of space travel in this 22nd Century era quite as well as The Catwalk. Because the NX-01 is a less-powerful ship than her namesakes further along the timeline, she’s less well-shielded and armoured, and that means that, when a dangerous interstellar phenomenon approaches, the crew has to take refuge in the only part of the ship that can keep them safe from the radiation: the nacelles.

There’s something weirdly almost “cozy” about that setup that I’ve always really appreciated. A community coming together, riding out a storm in a safe space… it just gives me the warm fuzzies, I guess! Of course, there’s more to the episode than that – and, naturally, things don’t go to plan. This is another episode with a one-off alien adversary who we haven’t seen return, and despite the uniqueness of its core premise, I think it’s one a lot of folks will have just scrolled past, especially on repeat viewings.

Episode #10:
How Sharper Than A Serpent’s Tooth
The Animated Series Season 2, Episode 5

Still frame from Star Trek TAS showing Arex, Walking Bear, and Kirk on the bridge
On the bridge of the Enterprise.

I’m cheating a tiny bit with this one; at a mere twenty-two episodes in total, it was too difficult to exclude both the top-ten and bottom-ten from The Animated Series! But ranked roughly in the middle – and, I would argue, easily overlooked – is How Sharper Than A Serpent’s Tooth, which is a fun story that sees Kirk and co. facing off against an ancient alien who once visited Earth.

The Animated Series was “officially non-canon” for a while, and it was only when I bought the DVD box set that I watched it in full. The animation work is definitely a product of its time (and something modern Star Trek has even parodied, with a miniseries called Very Short Treks) but for me, there are some great episodes in this oft-neglected series. How Sharper Than A Serpent’s Tooth was also the episode selected when The Animated Series won a Daytime Emmy Award in 1975 – so it has pedigree. And I think its core story is very “Star Trekky,” if you can look past the deficiencies in its animation.

Episode #11:
The Wounded
The Next Generation Season 4, Episode 12

Still frame from Star Trek TNG 4x12 showing Macet and Picard in the ready-room
Gul Macet with Captain Picard.

When you think of classic Cardassian episodes, I bet you don’t go to The Wounded first and foremost! Even in TNG, episodes like Chain of Command are much more likely to be memorable or draw your attention. But The Wounded marks the Cardassians’ first-ever appearance, and as such, it started the process of setting the stage for The Next Generation’s first spin-off: Deep Space Nine. We also see that through this episode’s massive expansion of Chief O’Brien’s role – O’Brien would go on to play a major role on DS9, of course.

The episode is also noteworthy for its introduction of Gul Macet – played by Marc Alaimo. Alaimo is best known for another Cardassian character: DS9′s Dukat. And you can kind of consider Macet a “proto-Gul Dukat,” I think! The Wounded is a kind of “Apocalypse Now” story, following O’Brien and Picard as they have to work *with* the Cardassians to stop a rogue Starfleet captain. It’s a great episode in its own right, and well worth a watch.

Episode #12:
Terrarium
Strange New Worlds Season 3, Episode 9

Still frame from Star Trek SNW 3x09 showing Ortegas
Lieutenant Ortegas.

I’ll be honest: I was surprised to see Terrarium ranked so low amongst Strange New Worlds episodes! For me, this is probably the best individual episode of Season 3, with a strong focus on Lieutenant Erica Ortegas and the lingering after-effects of the Federation’s conflict with the Gorn. In my review of the episode last year, I said that it was “intense, dramatic, emotional, and just fantastic,” and that really encapsulates how I feel. After having not spent that much time with Ortegas across the show’s first three seasons, her first real spotlight was genuinely exceptional.

However, I guess I can see why some fans might overlook it or choose to scroll past. When compared to the likes of Memento Mori or the two parts of Hegemony – episodes which also feature the Gorn – it’s not as action-packed or explosive. It’s also a character piece and a bit of a slow burn, in places. But as viewers and as Trekkies, I think we should be able to appreciate stories that aren’t just mindless action and fighting all the time, and slower, more introspective pieces about bridging a cultural divide and working together in the name of survival can be just as compelling and engaging.

Episode #13:
The Magnificent Ferengi
Deep Space Nine Season 6, Episode 10

The Ferengi and their captive.

Of all the episodes from DS9′s fantastic Dominion War arc, be honest: how many of you would’ve picked The Magnificent Ferengi for a re-watch? The episode is genuinely very funny, playing on DS9′s sillier and more light-hearted take on the Ferengi. It’s a great episode for recurring characters Rom, Brunt, and Nog in particular, as they join a mission of Quark’s to rescue Ishka (Quark and Rom’s mother) from Dominion captivity.

Naturally, nothing goes to plan for the Ferengi; the episode is almost a comedy of errors! But that’s what makes it so fun, and a guest-starring role for musician Iggy Pop was also a blast. The Magnificent Ferengi makes great use of DS9′s expansive secondary cast, ties into the sixth season’s Dominion War storyline in a new and unexpected way, and is a great example of how Star Trek can be hilarious when it embraces comedy and even slapstick. The Ferengi are indeed magnificent!

Episode #14:
Night
Voyager Season 5, Episode 1

Chakotay and Captain Janeway greet a guest in the transporter room.

Night is an episode of two halves. One side of the story explores something that few other Voyager episodes – or Star Trek episodes in general, come to think of it – really ever did: what does the crew do when there’s nothing to do and no planets to explore? We catch a glimpse of what life is like for the crew as they navigate a starless expanse with no interesting phenomena, alien spacecraft, or planets to crash-land on. And it really is fascinating!

But then the episode introduces one of Voyager’s lesser-remembered recurring aliens: the Malon. The Malon are another example of Star Trek shining a light on real-world issues through the lens of sci-fi: in this case, the financial incentives companies have to keep polluting, or to keep burning fossil fuels, despite knowing the harm it causes. It’s a great idea for a story: Starfleet shows up, offers an alien society a better, safer, cleaner technology… only to be turned down because of what it would mean for corporate profits. If only there was a modern-day industry that could benefit from this kind of metaphor, eh?

Episode #15:
Assignment: Earth
The Original Series Season 2, Episode 26

Gary Seven’s shape-shifting companion.

TOS has a lot of iconic moments, doesn’t it? But would you say Assignment: Earth or Gary Seven are among them? For me, this is an episode I will openly admit to regularly scrolling past when I re-watch The Original Series; I’m just not wild about time travel stories, as I think I’ve already mentioned. But that’s part of why it deserves a place on this list: Assignment: Earth is the definition of a hidden gem; an overlooked episode that has a lot of great qualities.

Firstly, it’s fun to see Gary Seven and catch a glimpse of a new faction that subsequent Star Trek stories did nothing with for half a century! But it’s also neat to see Kirk and co. in the 1960s, dealing with NASA. Remember that this episode aired shortly *before* the first moon landing, at a time when interest in NASA and space exploration was at its height. It’s another great example of Star Trek telling a “morality play;” in this case, an explicit warning against the use of nuclear weapons at a moment when the Cold War was raging.

Bonus Film:
The Motion Picture

Still frame from Star Trek The Motion Picture showing Kirk in a hallway
Admiral Kirk

I wanted to put one feature film on this list, and for me, no film quite embodies the “hidden gem” idea better than The Motion Picture. Fans tend to overlook Star Trek’s first film in favour of The Wrath of Khan, as well as other action-packed entries like The Undiscovered Country and First Contact. But for me, no film quite matches the tone of The Motion Picture, which has an ethereal sci-fi story that plays out like an extended episode of The Original Series.

This film is also where much of the aesthetic of Star Trek was created. Klingons with armour and forehead ridges, angled starship hallways, the warp core as a glowing upright tube, even metal Starfleet insignia on uniforms… so many things created for The Motion Picture have gone on to become inseperable from Star Trek, defining its visual language and identity. The film’s story is one of seeking out new life – even if that form of life is almost incomprehensibly different from anything Starfleet or humanity had previously encountered. Moreover, The Motion Picture brought Star Trek back and re-established it for a new decade – a decade which would eventually lead to more films and a return to the small screen.

So that’s it!

Behind-the-scenes photo from Star Trek TNG showing Gates McFadden and Bob Justman
Producer Bob Justman with his namesake shuttlecraft and Gates McFadden.

Happy sixtieth anniversary, Star Trek! I hope this selection of “hidden gems” has given you an idea or two if you’re planning a Star Trek marathon to mark the franchise’s birthday. I know that’s what I’ll be doing on Tuesday!

As I said above, I really wanted to put together a selection of episodes that I don’t think will be featured on a lot of similar list-icles. Star Trek has almost 1,000 episodes and films to choose from, but fans tend to gravitate to certain ones more than others. Some episodes aren’t great or are just padding, sure, but there are some really fun stories that tend to get overlooked or overshadowed by more popular or better-remembered contemporaries. And I wanted to highlight a few of them this time.

I hope you’ll join me on the 8th for an article all about Star Trek and its sixtieth anniversary! And if you missed them earlier in the year, I have a few other celebratory pieces I’d like to recommend to you.

Behind-the-scenes photo from Star Trek showing Deforest Kelley with Patrick Stewart
DeForest Kelley and Patrick Stewart in a behind-the-scenes photograph.

In May, I got to meet William Shatner – Captain Kirk himself – at an event here in the UK. I reviewed Starfleet Academy’s first season, the video game Across The Unknown, and I’ve been writing up individual episode reviews for Strange New Worlds’ fourth season, too. I wrote up another batch of my “what-if” scenarios, I took at look at some wild and wacky fan theories, I talked about some truly terrible things that Star Trek characters have done, I shared more of my “hot takes” on the franchise, and I even considered the potential benefits for the franchise if a hiatus is on the cards.

I’ve also been writing up episode re-watches over the past year, including Where No Man Has Gone Before, which was TOS’ second pilot, the iconic Arena from TOS’ first season, The Andorian Incident from Enterprise, and Skin of Evil, The First Duty, and The Royale – all from The Next Generation.

Click or tap any of those links to check out those pieces.

Still frame from a 1960s Star Trek TOS commercial showing key art
An original 1960s advert for TOS.

So I hope you enjoyed this list! It was fun to go back to these episodes, and it was also interesting to see just how many stories, characters, aliens, and more than I consider to be “too iconic” for a list like this one! I excluded quite a few episodes that would’ve been fun to discuss simply because I felt their status was a little too high, or else they had moments that crossed over into pop culture for one reason or another.

Thanks again for joining me on this exploration of a few “hidden gems” from the Star Trek franchise. There’s more Star Trek content to come here on the website; more Strange New Worlds reviews, more episode re-watches, more commentary, and who knows what else. But until then… Live Long and Prosper, friends!


Most episodes and films discussed above are available to stream now on Paramount+ in countries and territories where the platform is available, and may also be available on DVD and/or Blu-ray. The Star Trek franchise – including all films, TV shows, and properties discussed above – is the copyright of the Skydance-Paramount Corporation. Still frames from Deep Space Nine and Voyager were upscaled using A.I. tools. This article contains the thoughts and opinions of one person only and is not intended to cause any offence.

Ten great Star Trek episodes – Part 1: The Original Series

Spoiler Warning: In addition to spoilers for the episodes listed below, there may be minor spoilers for other iterations of the Star Trek franchise, including both Star Trek: Discovery and Star Trek: Picard.

This is the first part of a new series of list-articles in which I’ll look at ten great episodes from each of the Star Trek shows (except for Star Trek: Picard, which only has ten episodes in total at this point!) I didn’t want to call it a “Top Ten List”; that comes with a lot of pressure to both choose my all-time favourites as well as how to rank them! Instead, this is a list of “ten great episodes”, and they’re in order of release.

Star Trek – retroactively titled The Original Series to prevent confusion – premiered on American television in 1966. It ran for two seasons, with a third being granted in 1968 following an extensive letter-writing campaign by fans who feared its perpetually low ratings would lead to cancellation. Its third season would be its last, however. It was only when the series was syndicated and rebroadcast in the 1970s that its fanbase grew, leading to both an animated series in 1973 and finally a feature film in 1979. Star Trek: The Motion Picture was actually the culmination of several years’ worth of attempts to bring the franchise back to the small screen, which seem to have kicked off around 1975.

This is the series that spawned all the others, but as the fanbase has grown over time, many self-proclaimed Trekkies aren’t as familiar with The Original Series as they are with the Star Trek shows of the 1990s. For me, The Next Generation was my first encounter with the franchise, and it wasn’t until some time later that I got to see The Original Series. While it is dated by modern standards almost across the board – acting, set design, effects, and even storytelling – it is still worth watching for anyone who wants to see where the franchise began. Given that you may find yourself with time on your hands at the moment, it could be a great time to check out this classic series.

So let’s dive into the list – and be aware that there may be spoilers. (Do spoilers for a fifty-year-old series still need to be flagged?)

Number 1: The Cage (Pilot)

The bridge of the USS Enterprise at the beginning of The Cage’s very first scene.

Star Trek had two pilot episodes, the second of which – Where No Man Has Gone Before – was successful and got picked up for a full season. But before we got to meet William Shatner’s Capt. Kirk and the rest of the crew, Star Trek’s first pilot was rejected by television network NBC. Practically all of the footage shot for The Cage would end up recycled into a two-part episode in Star Trek’s first season, titled The Menagerie, but the episode would not be seen in full on its own until after The Next Generation premiered over twenty years later. It’s rare in television for a rejected series to get a second chance, and there have been many rumours over the years as to exactly how things went down in 1965 leading to the decision to make a second pilot, including that Lucille Ball – famous for her role in the classic 1950s series I Love Lucy, and co-owner of Star Trek’s production company Desilu – intervened on the show’s behalf.

An actor by the name of Jeffrey Hunter took the lead in The Cage as Capt. Christopher Pike – a character most recently portrayed by Anson Mount in Star Trek: Discovery. The USS Enterprise is lured to the planet Talos IV by a faked distress call, and Pike ends up captured by the Talosians – a race capable of using their minds to create illusions indistinguishable from reality.

Even in its remastered form, The Cage is janky and dated by today’s standards. With the general exception of Jeffrey Hunter, most of the performances are very much of their time – which is to say not particularly convincing. Acting has come a long way since the mid-1960s, and there’s a lot to be said for how much better, in general, the quality of acting performances are today than they were back then. Many aspects of the episode’s visual design are also not what you’d expect from a show made today. The indoor sound stage which was used to represent the surface of Talos IV is obviously artificial, as are the papier-mâché and polystyrene “rocks” and “mountains” which form the landscape of the planet. There are also some outdated references – at one point, Capt. Pike says he can’t get used to the idea of “a woman on the bridge” of his starship. But this was the reality of storytelling at the time, and for all of its flaws by today’s standards, this is where Star Trek began.

I’d argue that very few television series begin with a pilot that ends up being one of the best episodes overall. Shows take time to find their feet, for cast members to get to know each other and develop chemistry, and for writers and production staff to get into a rhythm. The Cage is our first introduction to all of the Enterprise’s crew, and with the exception of Spock, we wouldn’t see any of them return in a meaningful way until the second season of Star Trek: Discovery just last year reintroduced Capt. Pike and Number One. Those recast characters are so far removed from their origins in The Cage that they’re halfway to being new characters altogether, but we’re getting off the subject. The Cage in some ways contradicts or at least undermines some elements that would come later in Star Trek as its first season rolled out. For example, Spock behaves in an altogether different way to his usual cold and logical self. The one consistent character in both The Cage and Star Trek’s first season is actually inconsistent in his characterisation. Seeing Spock showing such emotion and behaving in a manner that is so human can be a jolt – so be prepared!

Number 2: Court Martial (Season 1)

Lawyer Samuel T. Cogley meets with his client, Capt. Kirk, in Court Martial.

Of all the first-season episodes which deal with Kirk, I feel none are quite so influential as Court Martial. By this point in its run, Star Trek was finding its feet. The core trio of Kirk, Spock, and McCoy was developing, and the Enterprise had a handful of adventures under its belt that had set the tone for the show. Kirk had been established as a caring commander, someone who would bend the rules for the sake of his ship and crew, but never for himself. So when we see him accused of negligence, manslaughter, and ultimately murder, and trying to cover his tracks to save his own neck, we know enough about the Enterprise’s captain to know this can’t be true!

The Star Trek franchise has some great episodes featuring courtroom drama. There was The Measure of a Man and The Drumhead from the second and fifth seasons respectively of The Next Generation, Rules of Engagement from Deep Space Nine’s fourth season, Death Wish from Voyager’s second season, and even a sequence at the end of Battle at the Binary Stars, which was the second half of Discovery’s premiere. All of these episodes, and others not mentioned, owe a lot to Court Martial for establishing courtroom drama as one thing that Star Trek can do exceptionally well. As an aside, I recently re-watched The Measure of a Man during Star Trek: Picard’s first season, and you can see the resulting article by clicking or tapping here.

Court Martial also makes good on the original pitch of Star Trek as being a “wagon train to the stars” – i.e. a western-inspired series. Old country lawyer Samuel T. Cogley – based, undoubtedly, on famed American lawyer Clarence Darrow – steps up to defend Kirk in what seems to be an open-and-shut case against him. The roles of Cogley and Dr McCoy in Court Martial would be just as at home in one of the many westerns of the time which Star Trek was influenced by. While the concept of an old country lawyer can hardly be called unique to the Star Trek franchise, Cogley has become somewhat of a cult character, with homage and parody paid to him in shows like Futurama.

Number 3: Space Seed (Season 1)

Space Seed sees the crew of the USS Enterprise tangle with Khan for the first time.

Khan would later become far more famous – and arguably a cultural icon – from his appearance in Star Trek II: The Wrath of Khan in 1982. But Ricardo Montalbán’s character debuted in Space Seed during Star Trek’s first season. One of the great things about The Wrath of Khan as a story is that it doesn’t make this episode essential viewing in order to follow the plot; it was, after all, released years before home video was commonplace. However, if you’re a Wrath of Khan fan who hasn’t seen the episode, or if you simply haven’t seen it in a long time, it does provide great background to the film.

In the far future – by 1960s standards – of the 1990s, a tyrant by the name of Khan would arise on Earth. Precisely how seems to have been lost to history, but Khan and his followers were genetically engineered and considered themselves to be super-human. After a conflict known as the Eugenics Wars, Khan was defeated, but he and some of his followers secretly fled into space, where they remained in stasis… until Capt. Kirk and the Enterprise crew discovered them!

Our understanding of Khan as a villain is largely based on his second appearance in the franchise, which, as already mentioned, can be taken as a standalone story. However, many of the elements that would be developed further in The Wrath of Khan are on display here, and this is where Khan’s rivalry with Kirk began. One element from the film is that Khan had a wife – her death is part of the reason he’s so angry with Kirk. While it has never been confirmed on screen, Enterprise crewman Marla McGivers is a solid candidate for who it could be. She was set to be included in The Wrath of Khan, but sadly actress Madlyn Rhue was ill with multiple sclerosis by 1982 and her character was written out of the film and not recast.

Number 4: The Doomsday Machine (Season 2)

In The Doomsday Machine, Commodore Decker is the sole survivor aboard the USS Constellation.

Season 2 is where Star Trek really hit its stride. At least in my opinion, most of the best episodes come from this season, which improved on Season 1 and came before the reduction in the series’ budget which contributed to a generally lacklustre third season. Though it can be hard to name an “all-time favourite episode”, The Doomsday Machine is definitely a contender for that title.

A thinly-veiled analogy for the issue of nuclear proliferation during the Cold War – which spills over at the end of the episode into in-your-face social commentary – The Doomsday Machine is a fascinating piece of television history, and a great example of how the Star Trek franchise can use its science-fiction setting to draw attention to real-world issues. When the episode premiered in October 1967, it was almost exactly five years to the day since the Cuban Missile Crisis brought the world as close as it arguably ever came to nuclear armageddon. Thus any examination of the episode has to understand its place in time. The Cold War was still rumbling on, with the Vietnam War approaching its apex. Practically everyone watching in 1967 would have vivid memories of the Cuban Missile Crisis, and even younger viewers would be acutely aware of the threat of nuclear war, as civil defence was taught to all schoolchildren in this period. While we may look back at it now as something rather dated, in its time, The Doomsday Machine was relevant social commentary.

But analogy and commentary alone do not make for entertaining television – and can, in some cases, detract from it. So what makes The Doomsday Machine such a standout episode is that floating atop the deeper meaning is an engrossing story. Commodore Decker is introduced as a broken officer, who had commanded the USS Constellation, a sister-ship to the Enterprise, when it encountered a plant-killing superweapon. With the ship damaged, Decker evacuated his crew to a nearby planet, only for the planet-killer to destroy it and kill them all. Devastated and clearly suffering from post-traumatic stress, Decker becomes obsessed with revenge – channelling Capt. Ahab from Moby-Dick – and tries to take down the planet-killer, even if it means putting the Enterprise in danger.

William Windom, who plays Decker, carries large parts of the episode in a way most guest stars don’t, even in more modern shows. His performance was inspired and riveting, and the raw emotion Decker is feeling at the loss of his crew plays exceptionally well against Spock’s cool, logical persona in particular.

Number 5: Journey to Babel (Season 2)

Sarek arrives aboard the Enterprise in Journey to Babel, and is greeted by Kirk, Spock, and Dr McCoy.

Journey to Babel introduced Sarek, who would become a recurring character in the franchise. Meeting Spock’s father, and seeing the cool, logical tension between them is, in a curious way, relatable to many of us in the audience. Mark Lenard, who took on the role, had previously played the unnamed Romulan commander in the first season episode Balance of Terror, which didn’t make this list but is itself well worth a watch as it introduces the Romulans for the first time.

The episode gives some fascinating backstory to the Federation itself, which would be built up much more in Star Trek: Enterprise in particular. We meet the other core races who founded the Federation along with humans and Vulcans: the Tellaraites and Andorians. Both species have cropped up at various points in other iterations of the franchise.

There are two story elements at play – the aforementioned family drama between Spock and his father, and a murder mystery which threatens the peace between the Federation’s races, in which Sarek is a suspect. Both stories are intertwined perfectly, making Journey to Babel tense and dramatic throughout. While father and son don’t exactly resolve their differences, the intervention of Dr McCoy using Spock’s blood to save Sarek’s life does go some way to improving things between them, at least for a time.

Number 6: The Trouble With Tribbles (Season 2)

This scene from The Trouble With Tribbles is arguably one of the most famous in all of Star Trek!

When fans and non-fans alike think about The Original Series – and the Star Trek franchise in general – one of the episodes that often springs to mind is The Trouble With Tribbles. The episode has become synonymous with the series in our broader cultural imagination in some ways, and while many people would struggle to think of any other story from The Original Series, I bet most people could recall The Trouble With Tribbles.

The little furry creatures have themselves become an inseparable part of the franchise – up there, I would absolutely argue, with the Borg and the Klingons as something that people inherently associate with Star Trek. That’s probably helped by their cute appearance and gentle purring noise – they’re like round, faceless cats!

The Star Trek franchise has itself leaned into this cultural trope. For its 30th anniversary in 1996, Star Trek: Deep Space Nine released a groundbreaking episode – Trials and Tribble-ations – using footage from the original episode with the Deep Space Nine cast creatively worked in. This technology was pioneered in the film Forrest Gump a couple of years earlier, but it was the first time it had been used on television, and the budget for Trials and Tribble-ations was sky-high as a result. More recently, Tribbles have featured in the Short Treks episode The Trouble With Edward. If you can find a copy – Short Treks is currently unavailable outside of the United States – it’s absolutely hilarious and well worth a watch.

In The Trouble With Tribbles, Capt. Kirk and his crew visit a space station which is holding a vital shipment of grain destined for a planet that both the Federation and Klingons want to control. In the midst of it all, a rogue trader has arrived at the station with, among other things, Tribbles for sale. Several crew members are immediately taken with the cute critters, but with a mystery to unravel and Klingons to outwit, Kirk has his work cut out for him! This is Star Trek at its best, blending different genres together and with a healthy side of humour to boot. No wonder the episode has become so famous.

Number 7: The Ultimate Computer (Season 2)

Dr Richard Daystrom introduces Dr McCoy, Spock, and Kirk to the M-5 Multitronic Unit in The Ultimate Computer.

The Ultimate Computer was, in many ways, a story ahead of its time. The idea of rogue artificial intelligence has become more common in sci-fi since 1968, and of course is a real-world concern too, being discussed even by the likes of (Star Trek: The Next Generation guest star) Stephen Hawking. The Star Trek franchise has used this concept to great effect with the Borg in particular – you can see my thoughts on the Borg as a story element by clicking or tapping here. It’s also been explored in great detail in Star Trek: Discovery’s second season with the Control AI, and of course in Star Trek: Picard’s first season with the rogue synths.

Star Trek: Discovery came closest to channelling The Ultimate Computer at points in its second season storyline, and the fact that the concept is just as interesting and frightening today as it was in 1968 makes this episode a great watch. Unlike some episodes of The Original Series, which can feel very dated, in that sense it is oddly timeless. Our collective fear as a species of out-of-control AI is one that is still present, arguably even more so today than when The Ultimate Computer premiered.

The episode also features one of Star Trek’s best guest performances by actor William Marshall, who took on the role of computer scientist Dr Richard Daystrom. Marshall’s role is another great example from Season 2 of Star Trek using its futuristic setting to address real-world issues – in this case, the issue of race. While Uhura had been a constant presence on the show since its second pilot, and Star Trek had already been in many ways groundbreaking in the way it dealt with black Americans in particular, Dr Richard Daystrom is yet another middle finger to the newly-desegregated Southern states, showing an incredibly intelligent engineer working in the future – who happened to be black. There was nothing in-your-face about it, no monologues to the camera or wry remarks by Kirk and the crew, simply the presence of a black man in a senior position being treated as normal and commonplace. It absolutely is those things today – or at least it should be – but in the 1960s race relations in parts of America were still very complicated.

Dr Daystrom’s legacy lives on within the Star Trek franchise, as he’s the namesake of the Daystrom Institute. This organisation was first mentioned in The Next Generation, and has recently appeared in Star Trek: Picard.

One thing that many fans don’t realise is that James Doohan was an accomplished voice actor. In The Animated Series he would often be called upon to voice guest characters, and in fact his Scottish accent was not his normal speaking voice; Doohan was Canadian. In The Ultimate Computer, he lends his voice to the M-5 Multitronic Unit.

Number 8: Spock’s Brain (Season 3)

In Spock’s Brain, Dr McCoy must tend to a brainless Spock.

Let’s be frank for a moment – Spoack’s Brain could well be the worst episode of The Original Series. Both in terms of its premise and the way it was executed, the third season’s premiere was poor. But amongst the wreckage of the story are some unintentionally hilarious moments, and the episode is well worth watching for that alone. In that sense, it’s akin to a classic B-movie.

If all of Star Trek had been on the level of Spock’s Brain, it would never have lasted even one season, let alone been renewed for an animated series, films, and spin-offs which now span more than half a century! But despite that, it’s worth coming back to episodes like this to see what The Original Series was beyond the familiar elements like starships and Klingons. Aside from the first couple of seasons of The Next Generation, which followed a similar format to The Original Series in many respects, episodes like Spock’s Brain aren’t made any more, and haven’t been since the dawn of the 1990s.

The episode aims to be a kind of sci-fi concept, looking at both the potential for technological dependence and how advances in medical technology could lead to things like brain transplants. But neither of these story elements landed, and it’s not without reason that the Star Trek franchise has never revisited Sigma Draconis VI.

Number 9: The Tholian Web (Season 3)

Caught between parallel universes in The Tholian Web, the USS Defiant glows an eerie green on the Enterprise’s viewscreen.

Perhaps it’s because we’ve seen The Tholian Web’s USS Defiant crop up in both Star Trek: Enterprise and Star Trek: Discovery, but I feel that The Tholian Web is one of the third season’s high points. Many stories in The Original Series are unique to this show in the sense that they wouldn’t translate well to other iterations of the franchise, but The Tholian Web absolutely would be at home in any other Star Trek show.

The Tholian Web is a space story first and foremost, and it brings to bear some elements from the claustrophobic war films of the 1940s and 1950s, particularly those set at sea and on submarines. The USS Defiant – a sister-ship to the USS Enterprise – is adrift and caught between two parallel universes, and Kirk and the crew are called to investigate. The Tholians – a race who resemble insects – intervene, trying to claim both the USS Defiant and this region of space for themselves.

Despite being inspired by war films, The Tholian Web is pure space-based science fiction in a way that many episodes of Star Trek arguably are not, especially in the third season. The drama and tension come from an extraterrestrial race and the concept of an alternate dimension, both key elements in sci-fi. In that sense, and combined with its ties to more recent iterations of the franchise, The Tholian Web could be a great introduction for someone wholly new to The Original Series but familiar with other Star Trek series. As an episode which makes extensive use of sets normally used for the USS Enterprise, The Tholian Web is one of Star Trek’s famous “bottle shows”.

Number 10: Whom Gods Destroy (Season 3)

Having been locked up in the Elba II asylum, in Whom Gods Destroy Garth of Izar attempts to commandeer the Enterprise.

Depictions of mental health on television have, in some ways, changed over the years. The presentation of mentally ill people as being dangerous and criminal was commonplace in the 1960s and earlier, as our understanding of mental illness was poor. The Star Trek franchise still has issues in the way it presents mental health – look at my thoughts on the Star Trek: Picard episode The End is the Beginning for how stereotypes and tired clichés are still present, or the portrayal of the genetically-engineered characters in the Deep Space Nine duology of episodes Statistical Probabilities and Chrysalis – but overall, audiences today have a better understanding of mental illness and thus, the way it is presented has evolved.

Whom Gods Destroy is, in some ways, a product of its time. However, what it does is introduce hope – hope that in the future, mental illnesses can be cured even in the most extreme cases. This kind of hopeful narrative is exactly what Gene Roddenberry wanted to use Star Trek to explore. His vision of the 23rd Century was one where humanity was working hard to overcome all manner of problems, and Whom Gods Destroy looks at how there may yet be hope for curing severely ill patients, which I feel is a positive message, even if the portrayal of Garth of Izar and the other Elba II inmates is very much dated.

The character of Garth of Izar is interesting, and the episode teases fans with some hints at Starfleet’s history prior to Capt. Kirk’s five-year mission. Kirk himself says that Garth’s exploits were required reading during his time as a cadet. As of 2020, Garth has yet to make another appearance, despite the era of Star Trek: Discovery potentially crossing over with the time he was an active officer in the fleet. However, a fan project titled Star Trek Axanar will take its own look at the character and the decisive Battle of Axanar when it eventually premieres. This project has been controversial in some Star Trek fan circles, but the passion of those behind it is unquestionable, and it will bring back several actors from past iterations of the franchise.

So that’s it. Ten great episodes from The Original Series that are well worth a first or second look. Many of the episodes I’ve chosen are closer to other iterations of the Star Trek franchise, but The Original Series also featured many episodes which looked at settings and concepts that future Star Trek shows would generally not touch, simply because television storytelling and science fiction in general had moved on in the intervening years.

When we consider the incredibly large and broad question of “what is Star Trek?”, for many fans The Original Series is the answer. It’s episodic television, with influences from westerns, World War II films, and other mid-century dramas. It’s also quite different, both in the way it looks and the way it’s presented, from much of what would come later. Whether that’s something you like or dislike is something personal and subjective, of course, and I’m not passing a judgement either way. These aren’t episodes which I’m saying are “objectively the best”, nor even are these my top ten favourites. To reiterate what I said at the beginning, these are simply ten great episodes that, for various reasons, are worth your time.

Stay tuned for more in this series of articles over the next few weeks. I will take a look at The Next Generation, Deep Space Nine, Voyager, and Enterprise, and pick ten great episodes from each of those series as well. Hopefully it won’t be too long before we’ll hear a solid release date for the third season of Discovery, too, and when we do I’ll be taking a look at each of those episodes as they’re released. In short, there’s much more Star Trek content to come here on the blog!

Star Trek: The Original Series is available to stream now on CBS All Access in the United States, and on Netflix in the United Kingdom and other countries and territories. The series is also available on DVD and Blu-ray. The Star Trek franchise – including The Original Series and all other properties mentioned above – is the copyright of ViacomCBS. This article contains the thoughts and opinions of one person only and is not intended to cause any offence.