The family is getting ready for the annual barbecue where Thomas and Heino compete about who can make the best hotdogs. Heino always wins, but this year Thomas has bought a new grill, even though he can't figure out how to assemble it. Sprinter builds him a special space-grill, but while they are testing it Heino comes. Can Sprinter hide in time, and wasn't he going home to his own planet?