Bonita Granville, Mildred Wirt Benson, Frankie Thomas, John Litel, Frank Orth, William Clemens, Kenneth Gamet

Nancy Drew and the Hidden Staircase is a movie starring Bonita Granville, Frankie Thomas, and John Litel. Nancy helps two aging spinsters fulfill the byzantine provisions of their father's will, but the murder of their chauffeur...