Tom Conway
Tom Conway, Private Investigator
Mila Parély
Helen Pascall
Naomi Chance
Gina, a model
Eric Pohlmann
Mr. Mercedes
Andrew Osborn
Capt. Colin Simpson
Richard Wattis
Detective Inspector MacLeod
Margaret Halstan
Lady Marchant
Eileen Way
Mme. Fernande
Michael Ripper
Eddie
Betty Cooper
Miss Betty, Showroom Mistress
Thomas Heathcote
Detective Sgt. Jessup
Alan Rolfe
Inspector
Roger Delgado
Marlowe
Reed De Rouen
Heath
Delphi Lawrence
Chelsea
Christine Forrest
Blonde
Ann Hanslip
Jane, model with shoulder-length hair
Davy Leon
George
Dorothy Robson
A Seamstress
Leo Phillips
Harry, the Night Watchman
Robert Moore
Stevenson
Denis Cowles
Commissionaire
John H. Watson
Chauffeur
Cleo Rose
Vivian
Cab Kaye
Self - Singer-Pianist (uncredited)
John Lynn
Nightclub Patron (uncredited)
Jack Mandeville
Fashion Show Attendee (uncredited)
Ernie Priest
Policeman (uncredited)
Crew
Terence Fisher
Director
Jimmy Sangster
Assistant Director
Molly Arbuthnot
Wardrobe Master
Mickey Delamar
Production Manager
Molly Terraine
Dialogue Editor
Len Harris
Camera Operator
Ivor Slaney
Music Director
Maurice Rootes
Editor
Philip Leakey
Makeup Artist
Michael Carreras
Producer
J. Elder Wills
Art Direction
Renée Glynne
Script Supervisor
Ben Pearson
Costume Design
Nina Broe
Hairstylist
Walter J. Harvey
Director of Photography
Jan Read
Screenplay
Bill Salter
Sound Recordist
George Burgess
Sound Recordist
Ivor Slaney
Original Music Composer