Brian Dietzen Says This Was One Of His Best Moments On NCIS

With characters coming and going from "NCIS", it's vital that the writers take the time to develop the newer faces, so that when mainstays leave, the audience is already rooting for the show's rookies.

One such rookie on "NCIS" is actor Brian Dietzen, who plays Dr. Jimmy Palmer on the show. Initially, Dr. Palmer was supposed to be a one-off character on the show, but the show kept bringing Dietzen back and eventually made him a series regular. Because Dietzen knew that he was only supposed to do one episode, he made big choices — which led him both to being asked back on the show and to his favorite memory of "NCIS" thus far (via CheatSheet).

"One of the big, memorable days is my first scene here. And I was hired to do one scene with David McCallum, one day. And I went in there, we had a nice juicy scene with David, where I was nervous, and I was working on a tape recorder. And he and I played really, really well together," Dietzen revealed (via CheatSheet). "It was very, very fun. And I remember thinking: this was really fun for my reel. Goodbye. Fortunately, they brought me back, and I still have a job here and that was awesome, but that was one of my most memorable."

And now, Dietzen has become an "NCIS" fan favorite — goes to show what can happen when you swing for the fences.