K - The Unknown

Virginia Valli

Sidney Page - a beautiful nurse

Percy Marmont

'K' Le Moyne

Margarita Fischer

Charlotte Harrison

Donald Keith

George 'Slim' Benson

John Roche

Dr. Max Wilson

Maurice Ryan

Joe Drummond

Myrtle Vane

Aunt Harriett Kennedy

William A. Carroll

Dr. Ed Wilson

Louis D. Lighton

Writer

Mary Roberts Rinehart

Novel

Raymond L. Schrock

Writer

Hope Loring

Writer

Harry A. Pollard

Director