While Mark is now known for his fabulous on-screen role as Leroy Jethro Gibbs on NCIS, he started off in a cereal commercial which he dubbed a bit "humiliating."The actor's father, Tom Harmon, was ...

Mark Harmon has come a very long way from his very first acting jobs.. The former NCIS star has been in the business since the early 1970s, and aside from his role as Special Agent Leroy Jethro ...

Like father, like son. A chip off the old block. There are corny cliches and there are simple facts as real as a heartbeat. Actor Mark Harmon and his late father, Tom, a Gary sports legend, shared ...

Mark Harmon's colourful life and career explored. From his defining role as Leroy Jethro Gibbs in NCIS to his sweet love story with Pam Dawber, and incredible act of heroism, here's what you need ...