Sean Harmon

Gibbs questions the choices he has made during the course of his life when a man pulls a gun on him at a diner.

The team finds a problem with the DNA samples collected while investigating the crash of a military plane that was transporting caskets.

Ziva and Gibbs head to a missing Marine's last-known whereabouts in Afghanistan; Tony's fears are revealed.

Callen and Sam resume their undercover identities as a prisoner and guard to infiltrate a white supremacist group believed to be in possession of stolen nuclear material.

Mac and Jo go to San Francisco to look for a missing teenage girl based on evidence found in crime scene photos.