Early season four leaves Crichton with nothing but time to work on his wormhole theories. He eventually reunites with the crew members of Moya, and Aeryn and Scorpius, who has fallen out of favor with Peacekeeper high command. Shortly, after arrival, Scorpius offers to remove Harvey. Due to the neural clone's longer presence within and increased familiarity with Crichton, Harvey's reaction includes persuasion and appeal to sympathy rather than threats. Crichton still agrees to allow Scorpius to remove the lingering neural spillover. Halfway through the season, Crichton finds his way back to Earth, but he voluntarily gives up the dream of Earth and returns to Moya. After a series of dangerous events (including Harvey's resurrection) Crichton and Aeryn find time alone together. Aeryn tells him he is the father of her child and Crichton proposes to her. The moment she accepts, an alien craft melts the two and ends the season.