Star Trek: Deep Space Nine: Season 5, Episode 8 - ProjectFreeTV

5 - 8: Things Past

Sisko, Dax, Odo, and Garak find themselves trapped seven years in the past on Terok Nor, but everyone thinks that they're condemned Bajorans. With Cardassians in control of the station, Odo's memory of a crime he once investigated may be the only key to their survival.