Rodriguez/Getty Mark Harmon wasn't originally too fond of his ... talk show hosts that his first role was actually beside his father, football and broadcasting icon Tom Harmon.

Mark Harmon left his NCIS days behind three years ago, hanging up his badge as Agent Leroy Jethro Gibbs after almost two ...

Both Sean and his father, Mark Harmon, will serve as executive producers of NCIS: Origins. The elder Harmon will also act as the show's narrator, adding an extra layer of connection between the ...

Mark Harmon's son, portrayed a younger version of his father's "NCIS" character seven times in the main series, he did not return to play the character in "NCIS: Origins." However, that doesn't ...