Don't Have a Cow

"Don't Have a Cow" is the episode of That's So Raven

Synopsis
Raven and Chelsea use an old spell book to get inspiration for good costumes to wear to a Halloween party, but a mishaps causes the two to turn into cows. Meanwhile, Cory and William go on a disasterous trick-or-treating trip.

Trivia

 * This is the first time that one of Raven's visions took up most of the episode.
 * Unlike most episodes, which are centered on reality, this episode is a foray into fantasy.
 * The title is based on Bart Simpson's catchphrase "Don't have a cow, man".
 * Raven and Chelsea turning into cows is most likely a tribute to Pinocchio.