VIDEO: Watch Mark Harmon Talk NCIS on THE LATE SHOW WITH STEPHEN COLBERT

Mark Harmon, who stars on the most popular television drama in the world, "NCIS," says the show's success is a testament to how happy the cast and crew are to come to work with each other every single day.

Watch the clip from "The Late Show With Stephen Colbert" below!

The Late Show with Stephen Colbert is the premier late night talk show on CBS, airing at 11:35pm EST, streaming online via CBS All Access, and delivered to the International Space Station on a USB drive taped to a weather balloon. Every night, viewers can expect: Comedy, humor, funny moments, witty interviews, celebrities, famous people, movie stars, bits, humorous celebrities doing bits, funny celebs, big group photos of every star from Hollywood, even the reclusive ones, plus also jokes.

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