Say the Magic Word : Season 1 Episode 7

Roland is having trouble performing his magic tricks, so Flabber agrees to lend him a book of magic words. When Roland loses the book, Trip and Van find it and accidentally conjure up a Magnavor who steals the book from them. Roland had made Jo invisible earlier and doesn't know how to restore her. Jo decides to use her haunting appearance to scare the Magnavors, get the book back, send the monsters back to the comics and, finally, to get visible again.