The Untold Truth Of Mark Harmon

He's been playing Leroy Jethro Gibbs on NCIS for the better part of two decades, and while many fans may wonder why Mark Harmon hasn't used his TV fame to star in more movies, Harmon says he prefers the consistent shooting schedule of a TV show. Harmon has been acting since the '70s, but it wasn't until the '80s when he would get cast in his first well-known role on St. Elsewhere, and he's been working consistently ever since. Even if you've been following his career for years, there might be a lot you don't know about the famously humble actor, so let's take a look at the untold truth of Mark Harmon.