“I Shrink Therefore I Am” is episode eight of season four of Farscape.
Crichton and the old woman are returning to Moya in a transport pod. When he contacts Pilot, the latter manages to slip in enough clues to reveal that something is wrong – and it is. Moya has been taken over by bounty hunters, who have been incentivized by Grayza’s rather large reward for Crichton. There’s a ship attached to Moya, and Crichton rams it.
Not quite everyone is captured, as Scorpius is free. Which means that’s he’s Crichton’s only ally.
The shrinking part of the title refers to a device the bounty hunters have that shrinks people. Fortunately, unlike the Master’s Tissue Compression Eliminator, it doesn’t kill them.