Nickelodeon Nightmare / Ready Steady Yeti

S4, E10: While some are saying the Seville Theatre is just old and falling apart, Mona knows that it's being haunted by a ghost that escaped from the big screen. / When Mona, Charley, and Lily go on a school ski trip they encounter a series of mysterious snowy incidents and Mona concludes there's only one rational explanation - the mythological Yeti has made the ski hill its home.