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

Rosemary Turnbull

Louise Carter

Floretta Turnbull

William Gould

Daniel Talbert

George Guhl

Smitty

John Ridgely

Reporter

William Hopper

Reporter

Creighton Hale

Reporter

Frank Mayo

Tribune Photographer

Frederic Tozere

District Attorney's Investigator

Don Rowan

Phillips

Dick Elliott

McKeever

Fern Barry

McKeever's Secretary (uncredited)

Nat Carr

Policeman (uncredited)

Sol Gorss

Reporters' Driver (uncredited)

Frank Meredith

Motorcycle Policeman (uncredited)

Jack L. Warner

Executive Producer

Hal B. Wallis

Executive Producer

Milo Anderson

Costume Design

Heinz Roemheld

Original Music Composer

Bryan Foy

Associate Producer

L. William O'Connell

Director of Photography

William Clemens

Director

Kenneth Gamet

Screenplay

Everett Alton Brown

Sound

Louis Hesse

Editor

Ted Smith

Art Direction

Mildred Wirt Benson

Story

Russell Saunders

Assistant Director

Lee Hugunin

Unit Manager

Edward Stratemeyer

Novel