Press and Laura identify the Mars astronauts as the prime suspects. Unable to find Patrick, they pursue the other astronauts, Anne Sampas and Dennis Gamble. They arrive too late to prevent Anne from having sex with her husband, resulting in her impregnation with hybrid offspring. A tentacle-like creature bursts from Anne's abdomen and kills her husband before Press and Laura manage to kill her. Meanwhile, a second team of agents locate and examine Dennis, but confirm he is not infected. Laura discovers that Anne's hybrid DNA does not match that in Orinsky's wounds, meaning Patrick is the killer. Meanwhile, Patrick has sex with his girlfriend, resulting in her death through the birth of another hybrid son. Horrified at causing her death, Patrick attempts suicide by shotgun, but the alien DNA regenerates his head and restores him back to life and temporarily killing his human side, with the drive to mate with as many women as possible. Dennis witnesses this and tells Press and Laura what he saw, remembering what happened in the capsule and joining them in their mission. Patrick begins impregnating as many women as he can, hiding his victims and up to twenty children on his father's property.