Jessica chooses Chester, but offers to let Donohue stay in the Tate house until he recovers from the shock. Burt wakes up on the spaceship, where the aliens reveal that they plan to replace him with a replica. The alien double moves in with the unsuspecting Mary. Carol's mother introduces Jodie to his newborn daughter, Wendy. Benson, Chester, Donohue and the Major prepare to rescue Billy from the cult. And Danny goes missing. (thetvdb.com)