Caleb Castille

A night at an amusement park takes a deadly turn when a roller coaster malfunction leaves lives hanging in the balance; Abby reaches out to Buck; Athena and Hen respond to an unusual home invasion.

When an FBI agent is killed while trying to track the location of an undercover agent, NCIS must find the missing agent before the criminals find him.

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

While Sam investigates the murder of an Iranian, he must also try to save a new agent who accidentally triggers a bomb; Nell makes a decision about her future.

The team assists the DOJ in the investigation of an arsonist who targets an FBI safe house that's protecting a political activist seeking asylum; Eric deals with the aftermath of Nell leaving the team.