Go Behind the Scenes of ‘NCIS’ With Mark Harmon & the Cast (PHOTOS)

With now 1,000 episodes and counting to the franchise, we did a little investigating of our own to find out about life on set for Mark Harmon (who played Leroy Jethro Gibbs until his on-screen exit from NCIS in Season 19 Episode 4) and our favorite cast.

Take a peek into the case file by scrolling down for the behind-the-scenes photos, along with insight into a few of the episodes and filming.

NCIS, Mondays, 9/8c, CBS

This is an excerpt from TV Guide Magazine’s NCIS: Special Collector’s Edition issue. For more inside scoop on the long-running CBS franchise, pick up a copy of the issue available on newsstands and for order online at NCISMagazine.com.