Director/a
Paul L. Stein
DIRECTOR/A
Reparto (por orden de créditos)
Robert Beatty
Bob Beacham
Rona Anderson
Mary Game
Clifford Evans
Tom Harmon
Stewart MacPherson
Stewart MacPherson - The Twenty Questions Team Moderator
Jack Train
Jack Train - The Twenty Questions Team Member
Jeanne De Casalis
Jeanne De Casalis - The Twenty Questions Team Guest Artiste
Daphne Padel
Daphne Padel - The Twenty Questions Team Member
Richard Dimbleby
Richard Dimbleby - The Twenty Questions Team Member
Norman Hackforth
Norman Hackforth - The Twenty Questions Team 'Mystery Voice'
Edward Lexy
Detective Inspector Charlton
Olga Lindo
Olive Tavey
Frederick Leister
Police Commissioner
Harold Scott
Maurice Emery KC
Wally Patch
Police Officer 'Tiny' White
John Salew
John Grimshaw
Gordon McLeod
Record News Editor
Liam Redmond
Echo News Editor
Kynaston Reeves
General Maitland-Webb
Homi Bode
Mohammed Ali
Sonya O'Shea
Stewart MacPherson's Secretary
Johnnie Schofield
Commissionaire
Philip King
Cheshire Cheese Waiter
Arthur Young
Doctor
Martin Boddey
2nd Plainclothesman (uncredited)
Michael Dear
1st Newsboy (uncredited)
Howard Douglas
Police Doctor (uncredited)
Norman Pierce
Golf Club Barman (uncredited)
Stuart Saunders
Laundry Delivery Man (uncredited)
Charles Saynor
Detective (uncredited)
Jack Sharp
Crewman with Prompt Board (uncredited)
John Tatham
20 Questions Audience Member (uncredited)
Merle Tottenham
Mrs. Tavey's Neighbour (uncredited)
Stanley Van Beers
McIntyre (uncredited)
Meadows White
Frederick 'Ricky' Tavey (uncredited)
June Whitfield
Undetermined Secondary Role (uncredited)