The Monitors, well-meaning aliens who thought they were helping humanity by taking over the Earth and rigidly controlling human behavior, are made to see that humans will never be happy unless they are free. The Monitors reluctantly leave Earth forever.
Once they are gone, the old President of the USA (Ed Begley) comes back to power, with the fascistic General (Keenan Wynn) and Colonel (Larry Storch) by his side. It appears that, with the aliens gone, Earth will go back to its old warmongering, polluting, ignorant ways.
But for now, hippies Max (Avery Schreiber) and Harry (Guy Stockwell) frolic happily with their girlfriends, enjoying their victory over the Monitors.
Thanks John L!