 The aliens blow off the last of the space dust, finally revealing the real title "How To Cook For Forty Humans".Enraged at Lisa's mistrust, they return the Simpsons to Earth, explaining that Lisa has ruined the family's chance at paradise on the aliens' home planet.The story is a play on words and was molded from "The Twilight Zone" episode "To Serve Man", which itself was a teleplay of a short story by Damon Knight.