When NCIS needed someone to portray a young Leroy Jethro Gibbs, the show’s team didn’t need to look far to find the right person. Sean Harmon – the son of Gibbs actor Mark Harmon – stepped ...

We're taking a look at their unbreakable bond… A doting father-of-two, Mark shares his sons, Sean, 35, and Ty, 32, with his wife, and fellow actor, Pam Dawber. A low-key family, the Harmon boys ...