50 Things You Didn't Know About Mark Harmon

Photo Courtesy: [Mark Harmon/Celebrity]

Mark Harmon is an actor and is best known for his role as Leroy Jethro Gibbs on NCIS. He appeared on the television series for almost two decades but has had an interesting career away from the series as well. Harmon has been featured in other successful television shows such as St. Elsewhere and Chicago Hope. In addition, he has starred in films such as The Presidio and Stealing Home.