Farscape: Season 4

Crichton, now aboard a dying leviathan named Elac, encounters an alien named Sikozu who aids him in stopping the Grudeks who are intent on obtaining toubray (Leviathan neural cluster tissue).

Everyone but Aeryn meets on Arnesk, where Jool has discovered the remains of an ancient civilization.

The crew discovers how far Scorpius has fallen in the Peacekeeper ranks. They must find and activate all the probes to stop the magnetic storm on Arnesk, but someone doesn't want them stopped.

The crew is on the way to rendezvous with Moya. After ingesting a concoction of Noranti's they stop for a break on a planet. Rygel is captured and entombed in amber by raiders.

Everyone finally reunites on Moya. But Aeryn returns with Scorpius, who claims to have saved the former Peacekeeper's life.

Crichton correctly predicts a wormhole's appearance near Moya, but simultaneously a giant space plant captures the Leviathan.

Crichton and Chiana get stuck in a video game where they encounter strange/twisted versions of their friends.

When Moya is raided by bounty hunters working for the Peacekeepers, every crew member is captured except for Crichton and Noranti.

While Moya and her crew are resupplying on a generally xenophobic planet, Aeryn kills the next prefect, along with many bystanders and D'Argo, while under a strange form of suggestion.

The crew consume food, sharing amongst themselves. Although if not ingested by the same person, it becomes toxic. They must quickly find a cure or they'll die.

Crichton falls into a wormhole and meets up with a strange man who shows Crichton the consequences of wormhole travel.

After accidentally returning to Earth, Crichton discovers he is in 1985 and he has altered the time line, causing his father to be scheduled to fly on the doomed shuttle 'Challenger'.

Crichton has arrived home, on Earth. Even though the Moya crew relaxes, on Earth and are treated as VIPs, Crichton can't seem to adjust to life on Earth. After all his adventures, can he still call Earth his home?

Moya takes on a new passenger, Talikaa, when Chiana insists upon it. However Talikaa turns out to be an alien creature in disguise and is intent on harvesting the crew's neural energy.

The males of the crew undergo some training. Crichton learns how to resist Scarran probes. While D'Argo learns some self control D'Argo encounters his wife's murderer, his wife's brother.

The women of Moya travel to a dead Leviathan to buy a sensor beacon for Moya which will allow her to appear to be a different ship. While there Aeryn and Sikozu spy on a secret meeting between the Peacekeepers and the Scarrans.

John Crichton struggles to learn the location of the mysterious Katratzi, whilst watching a television documentary about himself and the aliens.

Crichton and Scorpius travel to one of the 'unrealized realities' where Crichton believes he heard Stark say "Katratzi." Meanwhile on a Scarran ship, Aeryn resists torture.

The crew goes after Aeryn on a Scarran controlled station.

Moya arrives at Katratzi. Crichton attends the peace talks between the Scarrans and the Peacekeepers ...with a nuclear bomb.

Scorpius has betrayed the crew. Now they're all captured. Their plan failed, the crew has little choice but to help Scorpius's true agenda.

With their Crystherium stores low, the Scarrans must travel to Earth through a wormhole as those flowers grow there. With Pilots help, Crichton tries to collapse the wormhole leading back to Earth.