Troian Bellisario | NCIS

• Genre: Action, Military, Police procedural, Thriller
• Created by: Donald P. Bellisario, Don McGill
• Starring: Mark Harmon, Sasha Alexander, Michael Weatherly, Pauley Perrette, David McCallum, Sean Murray, Cote de Pablo, Lauren Holly,Rocky Carroll, Brian Dietzen, Emily Wickersham, Wilmer Valderrama, Jennifer Esposito, Duane Henry, Maria Bello, Diona Reasonover, Katrina Law, Gary Cole
• Theme music composer: Numeriklab
• Composers: Steve Bramson, Joseph Conlan, Brian Kirk
• No. of seasons: 21
• No. of episodes: 467
• Executive producers: Donald P. Bellisario, Steven D. Binder, Shane Brennan, Frank Cardea, Gary Glasberg, Chas. Floyd Johnson, George Schenck, Mark Harmon, Mark Horowitz
• Producers: David Bellisario, Avery C. Drewe
• Production location: Santa Clarita, California
• Cinematography: Billy Webb
• Running time: 39–44 minutes
• Production companies: Belisarius Productions, CBS Studios
• Network: CBS
• Release: September 23, 2003 – present

NCIS details the experiences and stories of a team of special agents who work for the Naval Criminal Investigative Service (NCIS). The team, called the Major Case Response Team (MCRT) primarily responds to high-visibility crimes; NCIS is the main federal law enforcement agency of the United States Department of the Navy, investigating Navy- and Marine Corps (USMC)-related criminal activities (e.g. deaths, force protection, treason, etc.), as well as their associated branches of government.

"Red Cell"

A marine is found dead at the local college campus, his neck broken and his friend and fellow marine missing. McGee and Abby discover a trace in the e-mails with several photos of the dead marine and his missing friend with their faces circled and Gibbs finds out that the marine and a group of fellow NROTC students were part of a paintball club. Back at the lab, Abby receives anonymous IMs from a hacker with cryptic messages about the two marines. The missing marine is found dead at an unused construction site, leading the team to suspect the deaths may be result of a competitive paintball game gone wrong, or something else none of the team expected.

"Twisted Sister"

When McGee's younger sister Sarah shows up disoriented and bloodied at his door in the middle of the night, and claims that she may have killed someone, McGee takes matters into his own hands, beginning his own independent investigation. Sarah claims that she is innocent, but has no memory of the past several hours and refuses to go with McGee to NCIS. While McGee works on figuring out what happened to his sister, the NCIS team is investigating a case of a Navy sailor, who is somehow connected to McGee's sister. Both Tony and Abby are busy with love problems, while McGee turns out to have another secret.