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 must try to save a new agent who accidentally triggers a bomb.

An FBI agent is killed while trying to track the location of an undercover agent.

Sam, Callen and Rountree travel to Afghanistan to help with a sensitive case.

The team assists the DOJ; Eric deals with the aftermath of Nell leaving the team.