Farscape: S2 E21 - Liars, Guns And Money, Part 3: Plan B Farscape
The crew is going to break into the depository to free Crichton. Crichton is being tortured for wormhole technology. Nothing is going like planned with those mercenaries but unexpected arrival of Talyn helps them to break free. They get rid of Scorpius but their losses are too big, among which Crichton's sanity.