Continuity mistake: When Claire and Russel are arguing in the classroom, the book on the table in front of Claire changes position frequently between shots.
Continuity mistake: Series 4 Episode 50 "The Bomb Shelter" When Nate picks up Maya to comfort her after he argued with Barb, he drops the cloth diaper bag, never picking it up again. But when he walks into the house, it's over his shoulder again.
Chosen answer: It is strongly implied that Lisa was murdered by her brother-in-law Hoyt, with whom she had been having an affair. When Nate confronts Hoyt about Lisa's disappearance, Hoyt shoots himself dead before the question is finally resolved.
pinkwafer