Darwyn struggles to maintain his cover as he assumes command of a new Los Angeles sleeper cell and questions the experience and skill of his new FBI case agent; Farik's interrogators use new techniques to get him to talk.
A woman recovering from the death of her husband becomes the chief suspect in the murder of her psychiatrist's wife when she is found next to the body.
The crew searches for an assassin when Brody's cryogenically frozen mother suddenly reappears and becomes the killer's target.