Jet Propulsion and his family are from the fictional planet Bortron 7 which orbits around a red dwarf called Bortron. They live at Boxwood Terrace in Washington, [5] where they study human customs and Earth environments for a travel guide. Jet has made friends with neighborhood children, including Sydney, Mindy, and Sean, whose parents work at the nearby Deep Space Array. The Propulsions' car turns into a flying saucer, which they frequently use to take the older children into space. Their alien identities are known to Sean, Mindy, and Sydney, but they otherwise make some effort to conceal their origin.