Allen gets ready for his first school dance. But he doesn't realise that an April Fool's Day trick is about to be played on him.
Allen goes on a journey where he has to show courage, honesty and sacrifice without the use of his powers. Meanwhile, Robbie and Josh are in for a disappointment when their parents announce they're separating.
Grandma Irma's dog is taken over by an alien parasite, which Allen is afraid of but must capture before it takes over Josh and the rest of the human race.
Josh isn't only into UFOs, he's into ghosts too--especially after he and Allen actually MEET one. Meanwhile, Ken and Robbie try to rewire the house.