Nancy Drew and the Hidden Staircase

Bonita Granville

Nancy Drew

Frankie Thomas

Ted Nickerson

John Litel

Carson Drew

Frank Orth

Captain Tweedy

Renie Riano

Effie Schneider

Vera Lewis

Miss Rosemary Turnbull

Louise Carter

Miss Floretta Turnbull

William Gould

Daniel Talbert

George Guhl

Smitty

John Ridgely

Reporter

William Hopper

Reporter (as DeWolf Hopper)

Creighton Hale

Reporter