Caleb Castille

A roller-coaster malfunction at an amusement park leaves lives hanging in the balance; Athena and Hen respond to an unusual home invasion.

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.

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 he was investigating do.

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

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.