Big news for NCIS fans: Mark Harmon is back.
The actor will guest star as Leroy Jethro Gibbs in a special crossover event on Nov. 11, connecting NCIS: Origins and the flagship NCIS series. The story revisits a 1990s naval officer’s death investigated by young Gibbs, only for the case to resurface in present day.
Though Gibbs left for Alaska to live in solitude, producers hint that circumstances have changed. “He’s no longer alone,” they reveal.
Harmon, who narrates Origins, hasn’t appeared onscreen as Gibbs since 2024. He says he was drawn to the new storyline and felt the timing was right.
The event begins with NCIS: Origins at 8 p.m. ET/PT and continues with NCIS at 9 p.m. ET/PT on CBS, streaming the following day on Paramount+.