Harmon narrates the series and also serves as an executive producer. After he guest starred in the first-ever NCIS and NCIS: ...

The transformation of Mark Harmon from childhood to "NCIS" included a lot of other roles, including a number of television shows. Given that he first played Leroy Jethro Tibbs in a 2003 episode of ...

Mark Harmon, Michael Weatherly, and LL COOL J return to the NCIS franchise, and Reasonable Doubt is back for Season 4.

Mark Harmon stepped down from his iconic role on CBS drama NCIS in 2021, focusing instead on guest appearances - and those ...