Mark Harmon to guest star on 'NCIS: Origins'

"NCIS" legend Mark Harmon is to guest star as his character, Leroy Jethro Gibbs, on the prequel, "NCIS: Origins," next month.
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Is Mark Harmon returning to NCIS as Gibbs? Here’s what we know

Mark Harmon will reprise his iconic Leroy Jethro Gibbs role in the flagship series. His return will be featured in a special (and first-ever) crossover event between NCIS: Origins Season 2 and the ...

Mark Harmon to make rare 'NCIS: Origins' appearance and Gibbs is 'no longer alone'

Harmon, 74, will make a rare guest appearance on "Origins" as Gibbs, the character he played for 18 "NCIS" seasons, during ...

‘NCIS’ Star Mark Harmon to Return as Gibbs in ‘NCIS: Origins’ During Veterans Day Crossover

NCIS' star Mark Harmon is reprising the role of Leroy Jethro Gibbs in an upcoming Veteran's day crossover episode of 'NCIS: ...