Editing Farscape (section)

===Season Four===
Alone for months, Crichton has had [[Crichton Kicks|nothing to do]] but obsess over Aeryn and wormholes. He finally makes a breakthrough on the latter when he meets a supposed Leviathan specialist, [[Sikozu]], on the run from her employers. When Chiana and Rygel also return, they [[What Was Lost Part I: Sacrifice|go together to Arnessk]], where Jool, D'Argo and the old woman – Noranti – have joined an Interon archaeological dig. They find artefacts that suggest a connection between humans, Sebaceans and Interons. Commandant Grayza interrupts, having taken Scorpius prisoner and "kills" him to show good faith to Crichton. Crichton wants nothing to do with her and [[What Was Lost Part II: Resurrection|escapes]].

Crichton finds that Aeryn has made a deal with Scorpius to [[Promises (Farscape episode)|let him on Moya]] after he saved her life. Crichton keeps Scorpius imprisoned but [[John Quixote|remains paranoid]] that his former enemy is planning something. Despite Aeryn's desire to reconcile, he pushes her away, even going so far as to suppress his feelings with drugs. A Scarran agent [[I Shrink Therefore I Am|invades Moya]], since the Scarrans and Peacekeepers are in an arms race to acquire Crichton's wormhole knowledge.

Crichton is instead [[Unrealized Reality (Farscape episode)|kidnapped]] by an Ancient whom he nicknames [[Einstein (Farscape)|Einstein]], who explains to him the catastrophic danger if wormhole tech falls into the wrong hands. Returning from that meeting, the entire Moya crew accidentally [[Terra Firma (Farscape episode)|ends up on Earth]], providing humans with their first confirmed contact with extraterrestrials and alien technology. Crichton is finally home but finds that the world is [[A Constellation of Doubt|too paranoid and distrustful]] to accept his alien friends due to 9/11 and the fact that the US government only wants to monopolize alien tech and knowledge for global domination. He has also been so affected by his experiences that he cannot relax there – a situation not helped when an agent of Grayza attacks and kills several of Crichton's friends. He decides the only thing he can do is leave again but he succeeds in convincing his father to make alien tech and knowledge to be shared equally globally much to the dismay of the US government.

The crew comes across a [[Bringing Home the Beacon|secret meeting]] between Grayza and a [[War Minister Akhna|Scarran minister]], at which Grayza sells out D'Argo's people in return for peace. In disrupting the meeting Aeryn is captured. Desperate to rescue her, Crichton promises to give Scorpius the wormhole tech in return for his help. They [[We're So Screwed Part I: Fetal Attraction|infiltrate a Scarran base]] and rescue Aeryn but Scorpius is captured in the attempt. Crichton is happy to leave him there but the neural clone Harvey informs them that Scorpius already has the wormhole tech and may reveal it to the Scarrans under torture. The crew of Moya are forced to launch yet another attempt to either rescue or kill Scorpius.

They [[We're So Screwed Part II: Hot to Katratzi|walk into another meeting]] at the Scarrans' most important base, Katratzi, claiming to want to sell the tech to the highest bidder. Instead they start a riot between the Scarrans' various servant races, [[We're So Screwed Part III: La Bomba|blow up the base]] using a nuclear bomb and escape again. The Scarrans launch an attack against Earth – partly in retaliation but also to secure a source of [[Strelitzia]] plants. The plants are vital to a Scarran augmentation process and Crichton had inadvertently revealed to the Scarrans that they can be found on Earth. The peacekeepers promise to protect Earth in exchange for allegiance but Crichton disagrees since it means dragging humanity into perpetual war between two galactic powers. Crichton's only option to [[Bad Timing (Farscape episode)|save his home world]] is to destroy the wormhole that leads there, leaving him stranded in space forever. Before destroying the wormhole, he says goodbye to his father and reveals that he has put a recording on the Moon near the site of the first Moon landing, containing technological data necessary for humanity to reach the stars in the future and protect themselves against alien threat.

That done, Scorpius returns to the Peacekeepers and the Moya crew go to the ocean planet Qujaga to recover. While there, Aeryn reveals that the pregnancy – formerly kept in stasis – has now been released and they are going to have a baby. Crichton proposes to her and she accepts. At the last second they are attacked by random aliens, who appear to kill them both.