Main "NCIS" cast members include Mark Harmon, Michael Weatherly, Pauley Perrette and David McCallum, as of 2015. Recurring cast members include Sean Murray, Brian Dietzen, Rocky Carroll, Emily Wickersham and Cote de Pablo.
Since its debut in 2003, "NCIS" has ranked as one of the highest rated shows on television. As a result, its main cast members place among the highest paid actors on television. As of June 2015, Mark Harmon earns over $500,000 per episode, in addition to his salary as a producer. Michael Weatherly and Pauley Perrette each make $175,000 per episode. In 2010, the main cast members of "NCIS" renegotiated their contracts due to the show's popularity.
In addition to the main and recurring cast members, "NCIS" has featured numerous actors in guest appearances. Some noteworthy guest stars include Richard Schiff, Colin Hanks, Bob Newhart and Corey Stoll. Guest stars such as Chris O'Donnell and Lucas Black went on to appear in spin-offs of the show, such as "NCIS: Los Angeles" and "NCIS: New Orleans," respectively. "NCIS" itself originated a spin-off of the "JAG" episode "Ice Queen," which introduced the characters portrayed by Mark Harmon, Michael Weatherly, Pauley Perrette and David McCallum. The main cast members of "NCIS" have also appeared as guest stars on "NCIS: New Orleans."