The murder of a petty officer sparks a lead in a 40 year old airport bombing cold case that Gibbs and DiNozzo have been assigned to for the past two years.
Shawn and Angela break up and Mr. Feeny is offered a job as a professor at Pennbrook college.
Andrea realizes she has to end a friendship that's gone on too long and a lice breakout at Amelia's school hits home.
Hetty asks operational psychologist Nate Getz to help Deeks and Sam return to work.
Samantha wakes up from an eight day coma with amnesia and must re-acquaint herself with her past to discover who she is, where she came from, and who is important to her in a didactic journey.