Paul L. Stein
Director
Don Russell
Art Direction
Victor Katona
Screenplay
Gerald Thomas
Editor
Patrick Kirwan
Screenplay
Ernest Palmer
Director of Photography
Hans May
Original Music Composer
Hal Britten
Camera Operator
Victor Katona
Producer
John O'Gorman
Makeup Artist
Jane Seymour
Makeup & Hair
Robert Beatty
Bob Beacham
Rona Anderson
Mary Game
Clifford Evans
Tom Harmon
Edward Lexy
Det. Insp. Charlton
Olga Lindo
Olive Tavy
Daphne Padel
Self - The Twenty Questions Team
Jeanne De Casalis
Self - The Twenty Questions Team guest artiste
Jack Train
Self - The Twenty Questions Team
Stewart MacPherson
Self - The Twenty Questions Team
Norman Hackforth
Self - The Twenty Questions Team 'Mystery Voice'
Richard Dimbleby
Self - The Twenty Questions Team
Harold Scott
Maurice Emery KC
Liam Redmond
Echo News editor
Homi Bode
Mohammed Ali
Kynaston Reeves
Gen. Maitland
Sonya O'Shea
Stewart MacPherson's secretary
Frederick Leister
Police Commissioner
Wally Patch
Police Officer 'Tiny' White
John Salew
John Grimshaw
Gordon McLeod
Record News editor
Philip King
Cheshire Cheese waiter
Arthur Young
Doctor
Merle Tottenham
Mrs. Tavy's Neighbour (uncredited)
Meadows White
Frederick 'Ricky' Tavey (uncredited)
