Mickey tries to quit smoking. Meanwhile, Ben meets a new friend.

Max runs into an old boyfriend, when she accompanies Caroline to see her father in jail.

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…

Kensi connects personally with a discharged Navy Intelligence officer suffering from post traumatic stress disorder who is the sole survivor of a deadly dispute being investigated by the NCIS team.

The gang attempts to cheer up a deeply depressed Dee, realizing they are the cause for her predicament.