Secret of the Blue Room

Lionel Atwill

Robert von Helldorf

Gloria Stuart

Irene von Helldorf

Paul Lukas

Captain Walter Brink

Edward Arnold

Commissioner Forster

Onslow Stevens

Frank Faber

William Janney

Thomas Brandt

Elizabeth Patterson

Mary, Cook

Robert Barrat

Paul, Butler

Muriel Kirkland

Betty, Maid

Russell Hopton

Max, Chauffeur

Anders Van Haden

The Stranger

James Durkin

Kruger, Commissioner's Assistant

Dick Rush

Carl Laemmle Jr.

Producer

William Hurlbut

Screenplay

Vera West

Costume Design

Carl Laemmle

Presenter

Heinz Roemheld

Music

Philip Cahn

Editor

Kurt Neumann

Director

Charles J. Stumar

Director of Photography

Abe Meyer

Music Director

Stanley Fleischer

Art Direction

Henry Henigson

Producer

Erich Philippi

Original Story

King D. Gray

Camera Operator

Jay Marchant

Assistant Director

Gilbert Kurland

Music Supervisor

Heinz Letton

Original Music Composer

Harry Grundstrum

Property Master

Fred Parkinson

Grip

Bill Richards

Assistant Camera

Tommy Valdez

Electrician