Mrs. Mouse is reading "A Visit from St. Nicholas" to her brood when a cat tries to break in. The cat overhears them arguing about the existence of Santa, so he dresses up accordingly.
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Billy Bletcher as Cat / Fake Santa Claus (voice) (uncredited)
Bernice Hansen as Little Cheeser / Other Mice Children (voice) (uncredited)
Dorothy Lloyd as Grandma Mouse (voice) (uncredited)