Here's Why Every Former 'NCIS' Star Left The Show (A Feud, Boredom & More Are Among The Reasons!)

There are some changes coming to the upcoming season of NCIS, which is about to be in its 21st season. Many of the fan favorite stars are still part of the show, including David McCallum‘s Dr. Donald “Ducky” Mallard, however, there are a handful of stars who have left the show over the 20 seasons. [...]