Nancy Drew and the Hidden Staircase

After a wealthy dowager who has made a substantial donation to her alma mater suddenly disappears, Nancy Drew sets out to solve the mystery.
Bonita GranvilleNancy Drew
John LitelCarson Drew
James StephensonChallon
Frankie ThomasTed Nickerson
Frank OrthCaptain TweedyH Helena Phillips EvansMary Eldredge
Renie RianoEffie Schneider
Charles TrowbridgeHollister
Dick PurcellKeiffer
Edward KeaneAdam Thorne
Mae BuschMiss Tyson
Tommy BuppSpud Murphy (uncredited)Production information and reference links
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