After winning a science contest at Little Dipper School, Elroy Jetson and his family are invited to view a space shuttle launch. Elroy and Astro wander onto the unmanned rocket just before it departs on a five-year mission into deep space. The rest of the Jetsons meet legendary space hero Colonel Chuck Upchuck. They are able to return the ship to Earth, but they were significantly aged. However after misusing polarity equipment they reverse their aging process.