Gotto Robotto/The Laser Wizard Mona the Vampire : Season 5 Episode 6

When Miss Gotto?s bossy older sister substitutes for her, Mona uncovers a horrible plot. Roberta Gotto is really a robot and she and her kind intend to take over the school. / After the kids encounter a maniacal wizard at the new Laser Dome, everything they imagine starts to come true.