Ep 21. Detained

In Star Trek: Enterprise's season 1 episode 21 titled "Detained," Captain Jonathan Archer and Ensign Travis Mayweather are imprisoned in an alien detention center after they unwittingly cross the border of an alien planet. The two are accused of being Suliban, a race known for their criminal activities and involvement in temporal cold war. The detention center is run by a group of alien species who are also victims of this war and have formed an alliance against the Suliban.

Archer and Mayweather become acquainted with the other inmates, including a friendly Tellarite named Kuroda and the ex-Starfleet officer Soval, whom Archer knows from his past encounters with the Vulcans. Soval, who is also detained on false charges, is bitter and ashamed of the way the Vulcans have treated humans in the past. The group eventually learns that they are all victims of mistaken identity and decide to work together to escape the detention center.

While attempting to escape, they discover a secret underground base that the Suliban have been using to conduct temporal experiments. They also cross paths with two Suliban, a woman named Danik and a young boy named Jamin, who are being pursued by the detention center guards. Archer and Mayweather decide to help the Suliban escape, and in doing so, they uncover a conspiracy involving the Suliban and the Tandarans, the aliens who run the detention center.

Despite Archer's efforts to expose the conspiracy, the Tandarans remain unyielding in their belief that all Suliban are criminals, and they refuse to release Archer and Mayweather. In the end, Archer and Mayweather are rescued by Enterprise, but the alien alliance dissolves as a result of the events that took place in the detention center.

"Detained" deals with themes of mistaken identity, prejudice, and the importance of working together to overcome adversity. It also explores the complicated relationship between humans and Vulcans and the struggle to earn mutual respect and trust between the two species. The episode features strong performances from Scott Bakula and Anthony Montgomery as Archer and Mayweather, respectively, and the ensemble cast of inmates bring a sense of camaraderie and teamwork to the story. "Detained" is a well-crafted, thought-provoking episode that showcases the best traits of Star Trek: Enterprise.