“Infinite Possibilities, Part 2: Icarus Abides” is episode fifteen of season three of Farscape.
In the previous episode, “Infinite Possibilities, Part 1: Daedalus Demands”, the Crichton on Talyn had apparently been taken over by Harvey – Harvey being Crichton’s name for the version of Scorpius that is inside his head – when the Ancient who appears as Crichton’s father had attempted to remove Scorpius, and was attempting to kill Aeryn.
A Scarran dreadnought is on the way, and they’ve stolen the wormhole data, so, somehow, they also need to destroy it.
The Harvey problem is easily resolved. The Scarran problem is more difficult to solve. The Ancient’s solution is a really powerful wormhole-technology based weapon.
Another episode without Moya and the rest.