Several years before making his debut on Ozzie's Girl, Mark, then barely a high school student, made his commercial debut for a Kellogg's ad, alongside his dad Tom Harmon. Tom, who passed away ...

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.

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 ...

The character's description reads: "Tasked with showing the newly minted Agent Gibbs the ropes, this father of young twins is thankfully practiced in patience." The series comes from Mark Harmon ...

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 ...