A woman Naval officer fails to keep an appointment with Mac and Sturgis; they search for her, then find her body. A suspect points them to smuggled uranium and a rogue terrorist group. Harm investigates a mishap at sea; Sergei meets Loren.

A Navy hospital corpsman goes on trial for the murder of a Marine during a field exercise; Mac prosecutes, Harm defends, and Bud serves and argues on the jury but later has second thoughts. Sturgis helps a submarine family stay together.