Mark Harmon to appear on premiere of “NCIS” prequel, “NCIS: Origins”
NCIS: Origins co-showrunner David J. North revealed on a recent panel that he, Harmon, and co-showrunner Gina Monreal came to the decision jointly. Though Origins is "focusing on [narrator Harmon] telling the story of 1991," he hinted that "as far as Mark appearing again, we are open to anything."