He's mean, he's charming, he's brilliant... he's Gibbs! (also posted under request)

NCIS Special Agent Leroy Jethro Gibbs (Mark Harmon)

NCIS (Naval Criminal Investigative Service) is more than just an action drama. With liberal doses of humor, it's a show that focuses on the sometimes complex and always amusing dynamics of a team forced to work together in high-stress situations. NCIS Special Agent Leroy Jethro Gibbs (Mark Harmon), a former Marine gunnery sergeant, whose skills as an investigator are unmatched, formerly led this troupe of colorful personalities. Gibbs, a man of few words, only needs a look to explain it all.

I am an NCIS Special Agent, and I don't have to salute you, or sir you, or give you any military courtesy.