Describe the show NCIS .
* " NCIS " ( TV series ) , a United States television show about a group of fictional agents of the above agency in Washington , D.C. ** " NCIS " ( soundtrack ) , three soundtracks of music featured on the original NCIS ( TV series ) ** "" , a spin - off of the show above , a show about fictional undercover NCIS agents in Los Angeles National Criminal Intelligence Service , the predecessor to the Serious Organised Crime Agency of the United Kingdom