Having started in 2003, NCIS hit the ground running and never looked back. With Mark Harmon taking charge as the legendary Leroy Jethro Gibbs, the show quickly made a name for itself by blending mystery with banter. Packed with twists, heart, and some seriously iconic moments, NCIS has remained one of the best shows to have ever come out of the television industry. And while NCIS is still going strong, even it isn’t free from your regular Hollywood drama.

NCIS has seen many actors come and go during this period, some leaving a more prominent mark behind than others. Forensic Specialist Abby Sciuto (Pauley Perrette) was one fan-favorite character who stuck with the show through thick and thin. Then, one fine day, it was revealed that Season 15 would be her last. Since then, it has been widely believed that Mark Harmon may have had something to do with her departure.