CBS's long-running series, NCIS, is a military procedural series and the first installment of the now-popular franchise created by Donald P. Bellisario and Don McGill. The series initially starred ...

For 18 seasons (and four season 19 episodes), Mark Harmon starred as former U.S. Marine Corps scout sniper–turned–special agent Leroy Jethro Gibbs. "What has always drawn me here is the character I ...