'Star Trek: Discovery': Five Fan Theories That Still Need to Be Dealt With
Star Trek: Discovery is currently on winter hiatus while it prepares to release the second chapter [...]
Is the 'Discovery' Part of Section 31?

One of the earliest theories to come out of Star Trek: Discovery was that the ship itself was the product of Section 31, a deep cover special operations and espionage group.
Section 31 is known for going to extreme measures to further Federation of Planets interests, but also for working without the knowledge or supervision of Starfleet.
Some fans believed that the Discovery could be a part of Section 31 partly because of the black-badge armed officers that were on board, and that it would help explain why the ship looks so different and more advanced than what was seen in Star Trek: The Original Series. The fact that the ship's registry number is NCC-1031 was something that some took as a clue.
However, another big reason this was a theory was that Captain Lorca seemed to have such great leeway to do whatever he wanted aboard the ship. If he was actually a part of Section 31, that would make a lot of sense, but as the series has progressed we now know that Starfleet, and specifically Admiral Katrina Cornwell, have been keeping a very close eye on Lorca and the Discovery, making this theory seem less plausible than it once did.
prevnextWill Admiral Cornwell Become Lethe?

This theory stems from the Star Trek: Discovery episode titled "Lethe," which is also the name of a character from the Star Trek: The Original Series episode "Dagger of the Mind."
That name and the fate of Admiral Cornwell in the episode led to the theory that Cornwell could become Lethe by the time "Dagger of the Mind" takes place.
Cornwell, betrayed by Lorca after a confrontation over his command of the Discovery, was captured by the Klingons. The theory suggested that Cornwell would be tortured by the Klingons and that would leave her in a state where she would be sent to the institution seen in "Dagger of the Mind," with her memories repressed and her name now Lethe.
However, in the fall finale episode "Into the Forest I Go", Cornwell was rescued by Ash Tyler and Micahel Burnham, but, while she seemed physically hurt, her mind was intact.
That said, Lorca is still around, and he likely remembers Cornwell wants to remove him from command. Who knows what lengths he could go to to ensure Cornwell is in no state to strip him of his duties.
prevnextIs Captain Lorca From the Mirror Universe?

Captain Gabriel Lorca is such an unconventional Starfleet captain compared to the ones featured in past Star Trek series that some fans think he may be from another dimension.
The sentiment goes beyond Lorca's unorthodox and aggressive style of command, although Lorca being from the Mirror Universe would explain the aggression.
Lorca seems to play pretty loose and fast with command structure, promoting new crew members to be a bridge or senior officer. He's also fixated on Michael Burnham for reasons not revealed yet and curiously invested in Lt. Stamets' work with the spore drive for a captain who is a warrior at heart.
From what Lorca has revealed of his past, we know that his previous ship was destroyed by his own hand in battle with the Klingons, or at least that's how he tells it. Admiral Cornwell has known Lorca since long before that battle, and now feels he's practically a different person.
What if that sentiment ends up being literal? Perhaps something went awry in that battle that brought the mirror universe Lorca over to the prime timeline.
prevnextIs Ash Tyler Voq?

Arguably the most popular fan theory surrounding Star Trek: Discovery is that Ash Tyler is actually the Klingon Voq after being surgically altered to appear as a human.
This idea stems from the classic Star Trek: The Original Series episode "The Trouble with Tribbles," in which a Klingon was modified to appear human in order to sabotage a Starfleet mission.
The theory presumes the when L'Rell sent Voq to meet the Matriarchs of Mokai, infamous among the great houses of the Klingons for their skills in spycraft, she was sending him to be modified to appear human so that he could infiltrate Starfleet undetected.
A new wrinkle revealed in the fall finale is that, if this theory is true, Tyler does not remember he was Voq. The episode showed flashes of what looked like torture at the hands of Klingons and a forced sexual encounter with L'Rell, but these may end up being false memories covering up the surgery performed by House Mokai and his past relationship with L'Rell.
prevnextDoes 'Star Trek: Discovery' Actually Take Place in a Different Timeline?

This theory may have more to do with how fans have received the new Star Trek series than anything that has actually occurred in it, but it's a theory that refuses to die.
The theory goes that all of the inconsistencies in the visual appearance of Star Trek: Discovery and all of the questionable continuity can be explained away by simply stating that the series takes place in a different timeline from past Star Trek series, and that this will ultimately be revealed to be the case in order to give the writers of the show a kind of "get out of continuity free" card.
Another version of this theory is that Star Trek: Discovery does begin in the prime timeline, but that it will end in another timeline. The USS Discovery will be a ship lost in time and history, and that's why it's never referenced again in future shows. This theory is slightly more plausible if only because the spore drive opens up so many possibilities.
That said, the producers of Star Trek: Discovery have refuted this claim at every turn. From even before the series premiered, they've said that it definitely takes place in the prime timeline. The series' tie-in novels have further interwoven the show's character's into the history of Star Trek, and one of the showrunners has stated that the series will begin to reconcile with established canon as it moves into its second season.
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