Love Potion / Stage Fright

S2, E16: Love Potion - The little monsters are in 'Potion Class', concocting new and untried potions with Professor Burns. Casper accidentally tries to brighten things up and ends up with a bright pink potion that puts the fear into Professor Burns. Stage Fright - The Scare School students are getting ready to stage a play, but there's a problem: Dummy Girl has disappeared!