CASTLE - "Fidelis Ad Mortem" - When a recruit officer at the NYPD Academy is killed, Beckett and the team go back to their old training ground to investigate. Meanwhile, Castle must reckon with a decision with profound consequences for him and Beckett, on "Castle," MONDAY, MARCH 21 (10:01-11:00 p.m. EDT), on the ABC Television Network. (ABC/Richard Cartwright)
NATHAN FILLION, JON HUERTAS, SEAMUS DEVER