Fans will finally be able to see Mark Harmon's grand return to the part of Leroy Jethro Gibbs in an ambitious crossover between "NCIS" and "NCIS: Origins."

NCIS Season 23 Episode 4 is titled Gone Girls and it will air on November 4 on CBS.

Mark Harmon is set to return to the NCIS universe in a special crossover event uniting NCIS and NCIS: Origins. The upcoming episode brings back his iconic character, Leroy Jethro Gibbs. The storyline connects past and present investigations across both series.

Harmon, 74, will make a rare guest appearance on "Origins" as Gibbs, the character he played for 18 "NCIS" seasons, during the first crossover event between the two CBS dramas on Veteran's Day, Nov. 11 (starting 8 ET/PT)

NCIS Season 23 Episode 3 detoured away from the more serious content for a laugh-out-loud hour with the B Team.

Mark Harmon, who spent 18 seasons on "NCIS," is reprising his role as special agent Leroy Jethro Gibbs for a crossover event.

As NCIS: Origins moves forward, fans can expect emotional complexity, professional stakes, and romance that’s both teased and restrained. Gibbs’ journey isn’t just about love — it’s about the making of a leader, a partner, and an agent whose choices reverberate across the franchise.

Mark Harmon is returning to the NCIS universe and he won't be alone! CBS and the beloved actor dropped all the details.

Mark Harmon is making a comeback to the NCIS franchise. CBS announced that the actor will return as Leroy Jethro Gibbs for the upcoming crossover event between NCIS and NCIS: Origins. Harmon starred on the Mothership for the first 18 seasons,

When NCIS first premiered in 2003, it didn’t look like the global TV phenomenon it would eventually become. In its earliest days — back when it was just a spinoff of JAG — the series had modest ambitions,