Gregory Scott Cummins

A notorious serial killer, who Brennan helped put behind bars, plays a deadly game with the forensic scientist.

After Mac's father is released from prison, Mac and Charlie stage their own deaths to save their lives; Frank, Dee and Dennis find unique ways of dealing with the loss.

Vance returns to partner up with Gibbs for a murder investigation connected to a former NCIS agent put away for evidence theft.

A wealthy bachelor and ex-Marine, killed by a fall from a rooftop, turns out to have been living a double life. The OPS team search for a motive when it is discovered that he was murdered.

Mac, Charlie, Dennis, Dee and Frank embark on a holiday adventure filled with stolen toys, childhood videos, naked elves and a bloody run-in with Santa Claus.

Dennis' mistaken identity bothers him for the wrong reasons; Mac tries to bond with his ex-convict father, who bothers Dee.