Caleb Castille

A night at an amusement park takes a deadly turn when a rollercoaster malfunction leaves lives hanging in the balance. Abby is relieved after getting some help taking care of her mother and tentatively reaches out to Buck, who is struggling with the life or death nature of the being a firefighter. Meanwhile, Athena and Hen respond to an unusual home invasion and a couple's dispute leads to a dramatic rescue for Bobby.

Sam, Callen and Rountree travel to Afghanistan to help with a sensitive case after two SEALs claim their chief murdered an unarmed prisoner.

An FBI agent is killed while trying to track the location of an undercover agent. Now, NCIS must find the missing agent before the criminals he was investigating do.

The NCIS's Office of Special Projects takes on the hard to crack cases in LA.

Sam investigates the murder of an Iranian exile working to overthrow the current regime, and he must also try to save Agent Roundtree, a new agent who's having an unexpectedly adventurous first day on the job, when he accidently triggers a bomb. Also, Nell makes a decision about her future with NCIS.