
Spoiler Warning: There are spoilers ahead for Star Trek: Discovery Seasons 1-4, Star Trek: Picard Season 1, and for other iterations of the Star Trek franchise.
With Discovery taking an unplanned six-week break, we’ve got a little time to settle in and collect our thoughts. The first half of Season 4 has seen some progress toward unravelling the mystery of the dark matter anomaly, but there are still plenty of questions! From this point, the story could go in many different directions, and could potentially make significant connections and crossovers with past iterations of Star Trek. Today, we’re going to consider one such possibility.
In the episode But To Connect, which served as the mid-season finale, Ruon Tarka returned. Tarka is a Risian scientist who had been working on the DMA and who had collaborated with the USS Discovery’s own Paul Stamets in the episode The Examples to build a working scale model of the anomaly. We learned more about him this time, including what he claims to be his motivation for wanting to destroy the DMA while preserving the machine at its centre: he wants to use it to travel to a parallel universe.

During a conversation with Book, Tarka claimed that he had “a friend” while he was forced to work for the Emerald Chain. This friend wasn’t mentioned by name, but appears to have been a major motivating factor for Tarka to find a way to cross the divide between universes; to “punch through” as he put it.
This could all be obfuscation on Tarka’s part; a made-up story to help him sink his talons into Book and manipulate him into doing his bidding. Tarka’s plans relied on Book: he needed him to either convince the delegates to approve the use of his weapon, or to use the stolen spore drive to deliver the weapon without Federation help. So we have to acknowledge that possibility.

But I was struck by the way this conversation deliberately kept Tarka’s “friend” hidden from us as the audience. Book asked who the friend was, but Tarka quickly waved away the question. That makes me wonder… who is this friend? And could it be someone we’ve met before – maybe in Discovery, but maybe in a past iteration of Star Trek?
So today we’re going to consider a few possible candidates for Tarka’s friend. Who could this person be, and if they survived their imprisonment with the Emerald Chain, might we be about to meet them?

I can’t decide right now whether Discovery is setting up Tarka to be the main villain for the rest of the season, or whether Captain Burnham and the crew will resolve this storyline within an episode or two before moving back to the DMA and Unknown Species 10-C. Either possibility feels just as likely, so we could perhaps see the Tarka storyline rumble on for much of the second half of the season.
But we’ll have to set that aside for now! I’ve put together a list of candidates for being Tarka’s friend and we’ll go through them one by one. Just remember one thing: I have no “insider information,” and I’m not trying to claim that any of this will actually be included in Star Trek: Discovery. This is speculation and theorising from a fan – and nothing more.
With that caveat out of the way, let’s jump into the list.
Friend #1:
Aurellio

Let’s see… Aurellio is a bona fide scientist. He worked for the Emerald Chain. He and Tarka know one another. And although Aurellio has been mentioned several times this season, we haven’t seen him. Could he be the mysterious friend?
I don’t think so, not unless Tarka is even more devious than we think! Although we haven’t seen Aurellio this season, we’ve heard multiple times that he’s working with Starfleet, and he even built the new spore drive that Book and Tarka used in But To Connect. So unless Tarka has somehow managed to fake Aurellio’s entire existence… I think we can rule him out.
But on the surface, Aurellio fits the bill in some respects! We don’t really know of any other ex-Emerald Chain scientists, so it’s an outside possibility that Aurellio is involved in all of this somehow.
Friend #2:
Altan Inigo Soong

Dr Soong is the son of Data’s creator, and was encountered by Admiral Picard on the planet Coppelius in Et in Arcadia Ego, Part 1 – the first part of the Picard Season 1 finale. As a human from the 24th Century, he shouldn’t still be alive almost eight centuries later, but Dr Soong had plans to transfer his consciousness into a synthetic body. This process was mentioned earlier in Discovery Season 4, as it was used to give Gray a physical body.
If Dr Soong was ultimately successful, it’s possible that his synthetic form survived to the 32nd Century, and he could therefore be Tarka’s friend. He was already a skilled scientist when Picard met him, and with centuries of time to develop his skills he could have proven invaluable to an organisation like the Emerald Chain.
Now we get into abject speculation, but if Unknown Species 10-C turns out to be connected to the super-synths from Picard Season 1, this could give Dr Soong an additional motive for wanting to escape to a parallel universe: he might be aware of the threat they pose to the galaxy and all organic races.
Friend #3:
The Doctor

Nothing that Tarka said about his friend implied that they’re organic – so the Doctor being a hologram shouldn’t count against him! I’ve speculated before that a backup copy of the Doctor could still be alive in the 32nd Century, as we saw in the Voyager Season 4 episode Living Witness. While the Doctor wasn’t a scientist per se, after decades living and working with the Kyrians in the Delta Quadrant he may have broadened his skills.
If the Doctor was re-activated to find a galaxy ravaged by the Burn and all of his friends long gone, he might well want to escape to an alternate reality – there’d be nothing left for him in the prime timeline.
Perhaps the Emerald Chain intercepted his ship while he was on his way from the Delta Quadrant, or perhaps this is a different copy or version of the Doctor altogether from the one we saw in Living Witness. Because of the Doctor’s nature as a hologram, he could have easily survived this long.
Friend #4:
Control

Captain Leland, who had been “assimilated” by the Control AI, was killed at the end of Season 2, and the existence of life in the 32nd Century seems to suggest that Control was permanently shut down shortly after the USS Discovery left. But what if that didn’t happen, or if the shutdown of Control was incomplete?
So far this season we’ve had more mentions of Control – and a greater discussion of the implications of its rise – than we got in the entirety of Season 3. Could that be setting up something big later in the season? Could Tarka’s friend actually be someone that the Control AI “assimilated?”
If so, perhaps Control plans to abandon this universe to find one more easily attacked and dominated – and Tarka may find that his friendship with whomever it is was little more than a ruse.
Friend #5:
Another Ruon Tarka

There are multiple parallel universes – perhaps an infinite number! At least some of those universes contain alternate versions of everyone we’re familiar with: the Mirror Universe and the alternate reality of the Kelvin films being just two examples. So what if Ruon Tarka’s “friend” is, in fact, a parallel universe version of himself?
Tarka was confident that the parallel universe he intends to reach is better than the post-Burn reality he currently inhabits. But how could he possibly know that unless he’d either seen it for himself or met someone from that reality? Though in theory anyone from that universe could be Tarka’s friend, I think someone with the self-assuredness and arrogance of Tarka would be more inclined to trust his own counterpart.
We know that Tarka isn’t bound for the Mirror Universe – at least based on what he told Book. But here’s a spoiler for my next theory post: what if he’s trying to reach the Kelvin timeline? His unnamed friend could be his Kelvin timeline counterpart.
Friend #6:
Michael Burnham

We’re sticking with the parallel universe theme here. If an alternate version of Captain Burnham had somehow crossed into our universe, perhaps she’d been captured by the Emerald Chain and forced to work with Tarka. She might have warmed up to him, telling him of her true origin in a different, better universe.
Burnham has a keen scientific mind, and had she ended up in Emerald Chain captivity they might well have tried to put her to work as a scientist. Discovery has also put Burnham at the centre of big storylines before, such as by making her the Red Angel in Season 2.
The counter-argument to this would be that everyone we met from the Emerald Chain, including Osyraa, Ryn, and Aurellio, didn’t recognise Burnham or claim to have seen her before. It’s possible that they never met her or that she was working in a different lab, but it could also be seen as a mark against this theory. Tarka also suggested that his friend was male, which could also rule out Burnham.
Friend #7:
Dax

Thanks to the inclusion of Gray and Adira, we’ve spent some time with the Trill over the past couple of seasons. Trill symbionts are particularly long-lived, and there’s evidence to suggest that Gray and Adira’s symbiont, Tal, may have been alive in the 24th or 25th Century. It isn’t impossible, then, for the Dax symbiont to have survived to the 32nd Century.
Dax was one character I felt could make a comeback in Season 3. Early trailers dropped hints about the Trill, and bringing back Dax could’ve been a great way for the show to give fans a nod and a wink – but without needing to bring back an actor from the past. The nature of Trill life means that Dax would be in a new host by now – and thus the character could be recast in an easy and inoffensive way.
In Deep Space Nine we saw Dax mostly as a scientist thanks to Jadzia, and while Dax had many different roles over the course of their lifetime, returning to a scientific field is a possibility – certainly if a millennium’s worth of knowledge could be put to use. Dax is also aware, thanks to their adventures with Sisko and others, of the likes of the Mirror Universe.
Friend #8:
Soji

Due to her synthetic nature, Soji is also someone who could potentially still be alive in the 32nd Century. With centuries’ worth of accumulated knowledge under her belt, and a desire to help her people, Soji may have continued the Soongs’ work on cybernetics at some point after her adventures with Admiral Picard.
We haven’t yet seen any Coppelius synths in Discovery’s 32nd Century, and I’d be curious to see what became of them. If they survived and were able to continue to build new synths, there could be a thriving population by now. Many of the synths looked alike, so it’s possible that Tarka’s friend may have a familiar face even if they aren’t a character we’ve met before.
It would be great to get a proper crossover between Discovery and Picard, and this could be one way of doing it. The only drawback is that, because of the difference in time periods, having a character like Soji appear in Discovery would potentially be a limitation on future Picard stories.
Friend #9:
A Borg (or ex-Borg)

Where is the Borg Collective? We haven’t heard so much as a whisper since Burnham and Discovery arrived in the 32nd Century. It’s possible that the Borg have been defeated somehow in the centuries since they last tried to conquer the Federation, but it’s also possible that they’re the mysterious Unknown Species 10-C!
Perhaps Tarka’s friend is a Borg, ex-Borg, or even the Borg Queen, and the Emerald Chain had somehow kept Borg in captivity. It could be that Tarka is the one being manipulated, and his efforts to stop the DMA will allow the Borg to gain control of the power source at its centre.
We saw in Picard Season 1 that Borg technology and components were deemed valuable, such that a black market had sprung up. The Emerald Chain is exactly the kind of immoral faction that might have dealt in harvested Borg implants, and that could explain why they kept Borg captives.
Friend #10:
Gabriel Lorca

Captain Lorca commanded the USS Discovery during the show’s first season – but this character was later revealed to be from the Mirror Universe. The prime timeline version of Captain Lorca has never been found, and despite Admiral Cornwell and others believing that he wouldn’t have survived for long in the Mirror Universe, it’s at least possible that he did.
Or perhaps we’re dealing with another alternate version of Captain Lorca, someone native to the parallel universe that Tarka is attempting to reach.
Regardless, it could be fun to see the crew’s reaction to encountering their old captain! And it would be neat to welcome back Jason Isaacs to Discovery – his performance was one of the highlights of an occasionally rocky first season.
Bonus Friend:
Literally anyone!

Thanks to technobabble, practically any major character from Star Trek’s past could have survived to the 32nd Century. Stasis fields, time-wormholes, transporter accidents, pocket universes, warp bubbles, and many, many different phenomena could be brought in to explain the reappearance of practically anyone.
We already saw an oblique reference to one such method in the episode Stormy Weather. The crew placed themselves in the ship’s transporter buffer in order to survive their dangerous escape from the void – a method employed by Montgomery Scott in The Next Generation Season 6 episode Relics. Could it be that this was more than just a callback to that classic episode, and was the setup for something that will come into play later?
With the exception of those few main characters who had been killed off outright – Captain Kirk, Tasha Yar, Jadzia Dax, and a couple of others – basically anyone could fill this role as Tarka’s friend and make a triumphant return to Star Trek!
So that’s it.

I could be completely over-reaching with this one, but I felt that there was something about the way Tarka refused to name his “friend” in But To Connect that could be significant. Why keep that individual hidden – unless there’s something that’s going to surprise us when they’re ultimately revealed?
We’ve seen the Abronians in cryo-sleep this season, and we’ve seen the crew of the USS Discovery put themselves in suspended animation in the transporter buffer. The DMA also contains a wormhole, a phenomenon that has been used to travel through time in past iterations of Star Trek. Gray used the “Soong method” to acquire a synthetic body. And there have been multiple mentions of parallel universes. Any of these could be hinting at the return of a major character, perhaps someone who used one of these methods to either survive to the 32nd Century or to cross over from their native universe.
So that’s my theory. Ruon Tarka’s “friend” is someone we’ve met before, perhaps someone from Star Trek’s past who we wouldn’t expect to see! Unfortunately we’ve got to wait at least six weeks to see if I’m right!
Star Trek: Discovery Season 4 is currently on hiatus and will return on the 10th of February. The first half of Season 4 is available to stream now on Paramount+ in the United States, Scandinavia, Latin America, and Australia. The show is on Pluto TV in the UK, France, Germany, Italy, and other parts of Western Europe at 9pm on Fridays and Saturdays. Individual episodes or the full season can be purchased on iTunes, Amazon Video, YouTube, and possibly other platforms in the UK, parts of Europe, and select other countries. The Star Trek franchise – including Discovery 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.