Are You Afraid of the Dark? S02E09 · The Tale of the Full MoonThe Tale of the Full Moon

Two young pet detectives try to figure out where all the neighborhood cats are disappearing to. They find a clue when looking through a neighbor's back yard. He seems to have a rather large collection of cat collars hidden in his backyard. They begin to suspect that he's a werewolf, but unfortunately, no one believes them.