11 Actors Were Considered to Play Leroy Jethro Gibbs on 'NCIS' Before Mark Harmon (Including 2 Oscar Winners!)

It’s hard to picture anyone other than Mark Harmon playing the role of Special Agent Leroy Jethro Gibbs on NCIS, but several other very talented actors almost landed the role! The 73-year-old actor played the iconic character on the JAG spinoff series for 19 seasons, becoming the second to last original series regular to depart