Michael Lanyard

Ron Randell

Grace Duffy

June Vincent

Guard at Diamond Exhibit

I. Stanford Jolley

Jamison

Alan Mowbray

Inspector Crane

William Frawley

John J. Murdock

Douglass Dumbrille

Marta Frisbie

Collette Lyons

Tanner

James Todd

Mynher Van Groot

Steven Geray

Steve Taylor

Robert Barrat

Policeman Detaining Marta and Jamison

Lane Chandler

Director

John Hoffman

Screenplay

Malcolm Stuart Boylan

Producer

Rudolph C. Flothow

Art Direction

Sturges Carne

Editor

James Sweeney

Characters

Louis Joseph Vance

Director of Photography

Philip Tannura

Story

Edward Dein