NCIS Star Mark Harmon Talks Favourite NCIS Moment on The Late Show Dec 14, 2019 NCIS

Star of one of the longest running dramas ever, NCIS, Mark Harmon visits his co-CBS bud Stephen Colbert on The Late Show! That’s right, probably the most popular drama in the world right now is NCIS, which is almost midway through its 17th (!!!) season. There must be so many…