"Crichton Kicks" (Episode 401)
Crichton ekes out a quiet existence alone onboard Elack-an old, dying Leviathan. But the peace ends with the intrusion of a female alien, Sikozu, and a squad of pirates intent on harvesting Elack's neural tissue. Reunited with former shipmates Chiana and Rygel, Crichton fights to save his new home from the pirates and their vicious pet-the Brindz Hound.
"What Was Lost, Part I: Sacrifice" (Episode 402)
Crichton, Chiana and Rygel are reunited with D'Argo and Jool at an archaeological site run by Jool's people, the Interions. The purpose of the dig is to find a missing probe that might reverse the planet's dangerous atmospheric conditions. When Peacekeepers led by Grayza land and capture the crew, Crichton finds himself unable to fight back, mysteriously compelled to do Grayza's bidding.
"What Was Lost, Part II: Resurrection" (Episode 403)
D'Argo and Sikozu come up with a plan to crash Elack onto the Peacekeeper pursuit craft, facilitating their escape. Crichton is forced to consort further with Grayza to ensure success. When the plan goes awry, the crew begins a search for the probe that will reverse the planet's deadly atmospheric conditions, but a most unexpected enemy stops them in their tracks.
"Lava's a Many Splendored Thing" (Episode 404)
After a forced landing, the crew is separated by an elaborate trap that leaves Crichton, D'Argo, Noranti and Rygel in a lava-filled system of underground caves. While Chiana and Sikozu are on the surface trying to reactivate D'Argo's ship, mercenaries led by a monster impervious to the fiery lava are hunting down Crichton and the others.
"Promises" (Episode 405)
Crichton and the crew return to Moya and find Aeryn suffering from Heat Delirium. To their shock, she is under the care of Scorpius, who wants asylum aboard Moya. Soon, a giant Lukythian ship arrives. Its captain, Ullom, claims that Aeryn is an assassin and that he will heal her in return for information about the crime. But is anyone telling the whole truth?
Behind-the-scenes interview with Rebecca Riggs ("Commandant Grayza")