Mark Harmon is known for his role as Leroy Jethro ... That said, a custody battle with his sister, Kristin Harmon, in the ...

Mark Harmon doesn't ascribe to the world of celebrity ... One of three siblings, Mark grew up with two sisters – Kelly and ...

Mark Harmon captained the flagship NCIS for 18 years ... and Samantha Russell on My Sister Sam. She and Mark reside in a $15 million home in Brentwood, LA, where they have lived for over two ...