NCIS - Season 1 - Eps 7: Sub Rosa
A decomposed body is discovered in a tub of acid at a naval base and Ducky and Abby learn that the victim was a submariner. Gibbs discovers that there have been no reports of a sub crewmember missing, so he deduces that one of the subs has an imposter on board. With this new information, the team must find out which sub the man posing as the victim is in and what intentions he may have towards the sub.
About NCIS

Title: NCIS
First Air Date: 2003-09-23
Last Air Date: 2025-03-31
Status: Returning Series
Rating: 7.627/10 (from 2333 votes)
Language: EN
Seasons: 23
Total Episodes: 487
Network: CBS
Genres: Crime, Drama, Action & Adventure
Production Companies: Paramount Television, Belisarius Productions, CBS Studios
Synopsis
From murder and espionage to terrorism and stolen submarines, a team of special agents investigates any crime that has a shred of evidence connected to Navy and Marine Corps personnel, regardless of rank or position.
Cast

Sean Murray
Timothy McGee

Wilmer Valderrama
Nick Torres

Katrina Law
Jessica Knight

Brian Dietzen
Jimmy Palmer

Rocky Carroll
Leon Vance

Diona Reasonover
Kasie Hines

Gary Cole
Alden Parker