Is Gibbs (Mark Harmon) a suspect in the death of a Marine on this week's "NCIS"?
A dead body is discovered on a rooftop, and underneath it is a number. The team is about to track it down, when Gibbs tells them there is no need. It is his service number.
Gibbs has to face demons from his past as he and his team try to unravel the cryptic message on the "Deliverance" episode.
Also on Tuesday night's episode, airing at 8 p.m on CBS, the team gets involved with a gang war and tries to track down the murderer.