NCIS

The hand tools that Mark Harmon uses on the set of NCIS are mostly his own. Those are the tools that he uses in his own personal workshop.

In addition to Troian Bellisario, one of Donald P. Bellisario's children, who plays as McGee's sister, there is also one of his sons, Michael Bellisario, who played Charles (Chip) Sterling on the show.

The sound heard at the beginning and end of each act, when the scene goes to black and white is Donald P. Bellisario making that noise into a microphone. He wanted a unique way of bookending each act.