Mark Harmon Returns as Gibbs in 'NCIS: Origins' and 'NCIS' Crossover Special

Mark Harmon is stepping back into the role of Leroy Jethro Gibbs after his exit from NCIS. CBS announced on Tuesday, October 28, that Harmon, 74, will make a special guest appearance during the first crossover event between NCIS and NCIS: Origins. The two shows intersect on Tuesday, November 11, with younger Gibbs (Austin Stowell) and the team investigating the small-town death of a naval officer in the ’90s. The case is then “unexpectedly reopened in the present day on NCIS,” according to the official synopsis, which teased how “the decades-spanning mystery finds the air order for the series