Star Trek: Enterprise: Season 4, Episode 16

4 - 16: Divergence (2)

With Columbia's help, the Enterprise crew grapples with the sabotage left by Klingon Augments as they pursue the truth behind Dr. Phlox's kidnapping. Trip rejoins Enterprise on a desperate mission to rejuvenate her warp drive. Then both ships head deep into Klingon space to find Dr. Phlox. Antaak convinces Phlox to cooperate with the Klingons and help find a cure for the mutated virus ravaging one of their outposts.