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Mark Harmon Returns as Gibbs for NCIS/Origins Crossover Tonight

The appearance is a brief check-in in the prequel hour, reflecting Harmon's ongoing role as narrator-executive producer.

Overview

  • Harmon’s on-screen return is confined to the NCIS: Origins segment of the two-hour event airing Tuesday, November 11 on CBS, with streaming on Paramount+ the next day.
  • The crossover links a 1990s murder probed in Origins to a present-day reopening on NCIS, connecting the franchise’s timelines without revealing plot specifics.
  • Showrunners David J. North and Gina Lucita Monreal say the episode offers a glimpse of Gibbs’ current life, teasing that he is no longer alone.
  • Harmon said he accepted the guest spot because he liked the idea presented by the showrunners, describing it as a good moment to check in on Gibbs.
  • The longtime star, who exited as a series regular in 2021 and remains an executive producer and narrator on Origins, told TV Insider he is open to more appearances but made no commitment.