Farscape: A Clockwork Nebari Rewatch Season 2, Ep 18
Moya is hijacked by two Nebari who administer a mind-cleansing drug to the entire crew, and plan on taking Chiana back to Nebari Prime. Crichton and Rygel, who are immune, must figure out a way to stop their captors before the Nebari reach their rendezvous.[via]
Farscape: Durka Returns Rewatch Season 1, Ep 15
A collision with a Nebari ship brings a Nebari criminal named Chiana to Moya, along with a mentally cleansed Captain Durka much to the surprise of Rygel.