When a Marine falls ill during a training mission due to an attack by a genetic weapon, the NCIS must track down the person responsible for unleashing it. Also, Deeks struggles with balancing work and home life when Rosa comes down with the flu.
Casts:
Chris O'Donnell, Daniela Ruah, Eric Christian Olsen, Medalion Rahimi, Caleb Castille, Gerald McRaney, LL Cool J