'NCIS' Celebrates 350 Episodes — See How the Cast Has Changed (PHOTOS)
On April 17, the long-running procedural hits the major milestone, reminding us just how much the show and its cast have changed through the years. In fact, Perette isn't the first to make her exit — in the show's earlier years, Mark Harmon was flanked by the likes of Michael Weatherly (Bull) and Cote de Pablo, both who have since left.
Still, a number of favorites are still around, such as Sean Murray and David McCallum. And in honor of the big episode, we're taking a look at the stars who made NCIS what it is today from way back when to now. Click through the gallery above for them all!
NCIS, 350th Episode airs Tonight, Tuesday, April 17, 8/7c, CBS