Mark Harmon left "NCIS" in an on-screen capacity, but he's still listed as an executive producer, showing that he still has his toes dipped in this world. Furthermore, the 72-year-old is close to some of his former "NCIS" co-workers, as he explained in an interview with People. While he needed to recharge his batteries when he parted ways with the series, he's assured fans that he isn't retired from acting.

"I think for the longest time, I was just tired, to be honest. My workload was heavy every week. I took it seriously, and there were a lot of people there who did the same. I miss the camaraderie, the lunches at the tables, and hearing about people's families and what they're doing away from the show. But it's a job."

Since leaving "NCIS," Harmon has been able to focus on other projects, such as writing the non-fiction book "Ghosts of Honolulu: A Japanese Spy, a Japanese American Spy Hunter, and the Untold Story of Pearl Harbor." However, now that he's had time away from the procedural series to relax and do other things, he might want to catch up with some old friends.