Ncis actors 2021: 59 Photos
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Mark Harmon. NCIS season 1 began with lead actors Mark Harmon, Sasha Alexander, Michael Weatherly, Pauley Perrette and David McCallum, however, the cast has consistently changed over the 21 seasons as actors have come and gone. Harmon – who played Leroy Jethro Gibbs – left NCIS after 18 seasons in October 2021.
So why did Mark Harmon leave NCIS? In a special featurette for the NCIS Season 19 DVD, Harmon — who was also an executive producer on NCIS — hinted that he left the series “to keep it fresh in his career. “What has always drawn me here is the character I play and to keep it fresh and to keep it challenging,” he said.
Malone had previously worked with Ziva David, whose position Bishop filled in the first place. This undercover operation would take her away from the team for too long of a time, in Bishop's own words, as she was fired from NCIS for leaking the documents. This led to her official exit from the series.
Mark Harmon's Leroy Jethro Gibbs is still part of the NCIS universe, as he's set to narrate the upcoming NCIS: Origins prequel series, but he hasn't been seen on screen since early Season 19 in 2021.
According to the actor, after 18 seasons of working almost exclusively as Leroy Jethro Gibbs, he wanted to tackle fresh and challenging material, something he couldn't do with the NCIS schedule.