Bes-produer ar stirad Charles Floyd Johnson a ro e eñvorennoù, "We all looked at that work. And everybody said, 'He's Gibbs.'" Harmon a dremenas ur c'hasting e 2003, ha Bellisario a zisklêrie: "I said, 'Oh, my God, he's Gibbs.' He had matured. He's good-looking in a totally different way than he was as a young guy." Ur wech kroget ar stirad e ouzhpenne "I am so lucky to have Mark Harmon as the lead. You have no idea. This cast is gold. Mark Harmon is a Middle American guy, even if he was raised in Southern California. His values are exactly the same as mine."