Deadly Hero is a 1976 thriller movie starring Don Murray, Diahn Williams, James Earl Jones, Lilia Skala, Treat Williams, and directed by Ivan Nagy from a screenplay by George Wislocki and Don Petersen. Released in 1976 with an R rating from the Motion Picture Association of America, the film was distributed by AVCO Embassy Pictures and is Treat Williams' film debut. Deadly Hero opened to mixed, mostly negative reviews by critics and was seen as a commercial failure.