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)