In May 1977 a second Amnesty benefit was held to build on the success of the first show and with the intent of developing momentum for a regularly-scheduled benefit show.

When Earth astronaut Capt. Chuck Baker arrives on Planet 51 -- a world reminiscent of American suburbia circa 1950 -- he tries to avoid capture, recover his spaceship and make it home safely, all with the help of an empathetic little green being.