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While visiting the apartment house where she grew up, schoolteacher Helen Foley (Janice Rule) makes the acquaintance of a strange little girl named Markie (Terry Burnham). It gradually develops that Markie holds a clue as to the identity of the person who murdered Helen's mother many years earlier. Without saying any more, we can note that the supporting cast includes Sheppard Strudwick and Michael Fox; also appearing is a cute child actress named Suzanne Cupito, who enjoyed a substantial adult career under the name Morgan Brittany. Scripted by Rod Serling and graced with a subtly sinister musical score by Jerry Goldsmith, "Nightmare as a Child" was the April 29, 1960, installment of Twilight Zone.