Are You Afraid of the Dark?

The Tale of the Full Moon (2x9)

Air date: Aug 21, 1993

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.