The "six" are played by David Carradine, Howard Hesseman, David Morse, Charles Haid, Jan-Michael Vincent and Richard Dysart. The "rock" is, of course, escape-proof Alcatraz Island. This TV movie dramatizes an actual 1946 breakout attempt--which was meticulously preplanned for eight years. And what would a movie about "The Rock" be without a cameo appearance by the Birdman of Alcatraz? Six Against the Rock's Birdman is impersonated by Dennis Farina.