John Loder
Reginald Parker / Edward Grey
June Duprez
April Manby Carson
Michael St. Angel
Lieutenant Bob Carson
Miles Mander
Chief Inspector W.R. Allison
Rose Hobart
Dorothy Kent
Gilbert Emery
Dr. Manby
Rex Evans
Leslie Shelton
Matthew Boulton
Inspector Graham
Olaf Hytten
Banks
Lydia Bilbrook
Mrs. Manby
Ian Wolfe
Lord Mayor Herman Brandon R. Clive
Milton Owen
Inspector (Uncredited)
Norman Ainsley
First Passenger (Uncredited)
George Atkinson
Bellboy (Uncredited)
Frank Baker
Inspector (Uncredited)
Frank Benson
Bellboy (Uncredited)
Lillian Bronson
Hotel Maid (Uncredited)
George Broughton
Bellboy (Uncredited)
Tom Burton
Policeman (Uncredited)
Wheaton Chambers
Clerk (Uncredited)
Robin Sanders Clark
English Pilot (Uncredited)
Harry Clay
Pilot (Uncredited)
Robert Cory
Chauffeur (Uncredited)
Alec Craig
Vacuuming Bellboy (Uncredited)
Victor Cutler
Pilot (Uncredited)
Herbert Evans
Manby's Butler (Uncredited)
Ellen George Ferguson
Mrs. Shackleton (Uncredited)
Sherry Hall
Hotel Desk Clerk (Uncredited)
Alec Harford
Ticket Clerk (Uncredited)
Joy Harington
London Waitress (Uncredited)
Lilyan Irene
Emily (Uncredited)
Colin Kenny
Inspector (Uncredited)
Connie Leon
Mrs. Clive (Uncredited)
Stanley Mann
Inspector (Uncredited)
Audrey Manners
Cashier (Uncredited)
Frank Mayo
Policeman (Uncredited)
Tom McGuire
Barman (Uncredited)
Mary McLeod
Pamela (Uncredited)
Gavin Muir
Captain Perry (Uncredited)
Joseph North
Second Passenger (Uncredited)
Robert R. Stephenson
Inspector (Uncredited)
Doris Stone
Dorothy's Maid (Uncredited)
Gus Taillon
Newsie (Uncredited)
David Thursby
Fireman (Uncredited)
Alan Ward
Policeman (Uncredited)
Eric Wilton
Luggage Clerk (Uncredited)
Steve Winston
Policeman (Uncredited)
Florence Wix
Mrs. Kent (Uncredited)
Max Nosseck
Director
Hugh Gray
Additional Dialogue
Max Nosseck
Screenplay
Arnold Lipp
Screenplay
Herman Schlom
Producer
Sid Rogell
Executive Producer
Leigh Harline
Original Music Composer
J. Roy Hunt
Director of Photography
Les Millbrook
Editor
Ralph Berger
Art Direction
Albert S. D'Agostino
Art Direction
Harley Miller
Set Decoration
Darrell Silvera
Set Decoration
Renié
Costume Design
Lloyd Richards
Assistant Director
Vernon L. Walker
Special Effects
Roy Meadows
Sound
James G. Stewart
Sound Re-Recording Mixer
Harold Palmer
Editorial Services
C. Bakaleinikoff
Music Director
Gil Grau
Orchestrator
Lawrence Morton
Orchestrator
Frank Tours
Additional Music
Franz Waxman
Additional Music
Roy Webb
Additional Music