Mario Roccuzzo (November 9, 1940 – October 9, 2021) was an American actor, most commonly known for his episodic roles on television police dramas, although he played various parts on significant sitcoms and in films. His appearances include Hill Street Blues, Barney Miller, and NYPD Blue, as well as Star Trek: The Next Generation and The Untouchables. He had over 250 television roles, and a dozen in feature films. In addition, in 1958, Roccuzzo wrote the famous Eddie Cochran rock song, "Nervous Breakdown".