11. Twilight — Star Trek Enterprise
After an accident on the Enterprise, Archer loses his short-term memory and begins to wake up every day not remembering anything from the day before.

10. In A Mirror, Darkly (Part 1+2) — Star Trek Enterprise
In the mirror universe, the crew of the ISS Enterprise is fighting rebels who oppose the Terran Empire when they discover the Tholians have captured a vessel from the future.

09. Scorpion 1+2 — Star Trek Voyager
About to enter Borg space, Voyager finds a threat so devastating that even the Borg cannot deal with it.

08. Such Sweet Sorrow — Star Trek Discovery
When the U.S.S. Discovery’s crucial mission does not go according to plan, Burnham realizes what must ultimately be done. The crew prepares for the battle of a lifetime as Leland’s Control ships get closer.

07. Yesterday’s Enterprise — Star Trek The Next Generation
The Enterprise C enters the Enterprise D’s time and space continuum, where they find Picard and crew in a constant state of war with the Klingons, and only Guinan knows it.

06. The Best of Both Worlds (Part 1+2) — Star Trek Deep Space Nine
Responding to a distress call on one of the Federation’s outer-most colonies, the Enterprise arrives…only to find a big hole in the ground where the town used to be, and discovers the Borg are behind the attack.

05. Mirror Mirror — Star Trek The Original Series
The episode involves a transporter malfunction that swaps Captain Kirk and his companions with their evil counterparts from a parallel universe. In this “mirror universe“, the Enterprise is a ship of the Terran Empire, a conquering and murdering organization where officers are assassinated as punishment and as a means of promotion.

04. Year of Hell (Part 1+2) — Star Trek Voyager
Voyager comes across a Krenim timeship that’s wiping whole species from existence to change the existing timeline.

03. In The Pale Moonlight — Star Trek Deep Space Nine
To save the Federation in a critical scheme, Sisko comes to realize that he must violate its fundamental principles to do so.

02. The Inner Light — Star Trek The Next Generation
Picard awakes to find himself living in a small village where he is a well-known member of the community who is suffering from a delusion of being a starship captain.

01. The Visitor — Star Trek Deep Space Nine
Melanie, an aspiring writer, wants to know why Jake Sisko stopped writing at 40. Jake tells how his father died in an accident and then suddenly reappeared.