Dil receives an alien autopsy from a 11th grader and makes plans to watch it with Tommy, while his parents are at an Invention Convention. But when Didi tells them that Grandpa Lou is going to babysit them, they decide to make plans to watch it in the basement, by making Grandpa Lou fall asleep. While, sneaking downstairs Grandpa Boris comes over and starts fighting with Grandpa Lou. So the boys decide to try to make both of them fall asleep before Dil has to return it to the 11th grader that gave the tape too him.