Sean Harmon

While investigating the crash of a military plane that was transporting caskets, the NCIS team discover a discrepancy with the DNA remains.

While stopping by his usual diner for coffee, Gibbs finds himself in grave danger, prompting him to think about his past and the choices he made in his life.

The search into the disappearance of a marine lieutenant continues, as the NCIS team tracks them down to Afghanistan. Meanwhile, Tony's deepest fear resurfaces and Gibbs has to go through memories of his past again.

Flashbacks reveal the murder case that first introduced young Gibbs to NCIS and to Ducky.