Star Trek: Deep Space Nine
Season 5
Episode 6: Trials and Tribble-ations
TV-PGNov 04, 1996
Stardate: 4523.7. Darvin, a disgraced Klingon spy, travels back in time to alter some events to his likings. The DS9 crew must find what he's trying to change and prevent it without altering the time line. They'll have to blend in with the crew from Star Trek: The Original Series.