Continuity mistake: Halfway through the episode, they are in a helicopter looking for Walker and the others in a raft on a river. Half the time, the helicopter is shown going upstream and half the time the helicopter is shown going downstream.
Continuity mistake: Alex says that a painting her father gave her was destroyed by LaRue, and he's gone so that can never be replaced. Season 5 episode six "Redemption" introduces the still alive Gordon Cahill, her father.
