When Callen goes to the National Counterterrorism Center on the pretext of interrogating a Russian asset from the crashed plane case he investigated months earlier, the tables are turned and he is detained, accused of being a Russian agent.

NCIS investigates the apparent suicide of a Navy intelligence officer who leapt to his death after taking LSD. Also, while Kensi is away, Deeks makes plans to redo the backyard without her input.

NCIS investigates the robbery of a high-end arts storage by going undercover as potential buyers on the black market, to find who is behind the stolen items.

The NCIS team works with DEA Agent Talia Del Campo to find a missing whistleblower set to testify against gun manufacturers marketing to drug cartels.