Beckett needs to go undercover and impersonate an assassin to stop a drug ring. A cover she was told was just a drug currier by her handlers before she went under. Has she been forced to do the unthinkable, kill someone to keep her cover?

A man lies dead in “Room 147.” Easy one for Castle and precinct, they have a confessor. Only problem is the other two confessors to the murder who also turn up.

The murder of a high school mean girl draws Castle back to one of his many alma maters, where he is giddy to learn that the evidence points to a surprising suspect- a telekinetic teen.