The team investigates the death of a petty officer and discovers he may have been leading a violent secret life.

Castle is captured and forced to work with strangers to solve deranged puzzles and mind games, while Beckett and the 12th Precinct must race against time to rescue Castle and…

Brennan and Booth travel to Mexico to investigate human remains with extraterrestrial attributes; Angela and intern Wendell come clean about their relationship.