The Black Room

Boris Karloff

Baron Gregor de Berghman / Anton de Berghman

Marian Marsh

Thea Hassel

Robert Allen

Lt. Albert Lussan

Thurston Hall

Col. Paul Hassel

Katherine DeMille

Mashka

John Buckler

Beran - the gypsy

Henry Kolker

Baron de Berghman

Colin Tapley

Paul Hassel as a young lieutenant

Torben Meyer

Peter, the majordomo

John George

Inn Waiter (uncredited)

John Bleifer

Franz - Captured Assassin-Villager (uncredited)

Marion Lessing

Maria the Chambermaid

Roy William Neill

Director

Directing

Arthur Strawn

Story

Writing

Arthur Strawn

Screenplay

Writing

Henry Myers

Screenplay

Writing

R. H. Bassett

Music

Sound

Milan Roder

Music

Sound

Louis Silvers

Music

Sound

Edward Bernds

Sound

Allen G. Siegler

Director of Photography

Camera

Fayte M. Browne

Camera Operator

Camera

Gert Andersen

Assistant Camera

Camera

Richard Cahoon

Editor

Editing