Before becoming NCIS agent Leroy Jethro Gibbs, Mark Harmon was a medical doctor on two classic TV shows. Which?

Before becoming NCIS agent Leroy Jethro Gibbs, Mark Harmon was a medical doctor on two classic TV shows. Which?

Before becoming NCIS agent Leroy Jethro Gibbs, Mark Harmon was a medical doctor on ‘80s medical drama St. Elsewhere and ‘90s Chicago Hope._x000D_

Is Mark Harmon leaving NCIS?

_x000D_Monday’s, Oct. 11, 2021, episode of NCIS was Mark Harmon’s final leading the long-running CBS procedural. He exits the show after 18 years of playing agent Leroy Jethro Gibbs, dating back to the character’s introduction to the legal drama JAG in 2003.