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)