Following an ambush, the SEAL team suspects someone on the inside is leaking information to the cartel.
The friends plan their futures. Marissa attends Johnny's surf competition instead of completing her college application. Julie is forced to return to her roots.
Nora and Erika face some painful questions about their losses and lives; Kevin admits to a secret.
When a torpedo hits a fishing trawler at sea, the entire Gulf Coast is in jeopardy as Pride and NCIS race to find the submarine before it can strike again.
When a mission goes wrong, Sydney's is placed in danger and Marshall is the only one who can save her. Meanwhile, Dixon is exposed to a deadly pathogen released inside APO.
