Storm Front, Part II

Vosk and his people altered Earth's past, threatening to destroy many futures. Frustrated by limited Nazi technology, Vosk offers to return Trip and Mayweather to the Enterprise if Archer assists Vosk in creating his time machine. Vosk releases the prisoners, with Suliban agent Silik taking Trip's form; Silik also needs to stop Vosk.

Synopsis adapted from TVmaze (CC BY-SA 4.0)