Actors
Alec Guinness
Professor Marcus
Cecil Parker
Claude, alias 'Major Courtney'
Herbert Lom
Louis, alias 'Mr. Harvey'
Peter Sellers
Harry, alias 'Mr. Robinson'
Danny Green
'One-Round', alias 'Mr. Lawson'
Katie Johnson
Mrs. Wilberforce
Jack Warner
The Superintendent
P
Philip Stainton
The Sergeant
F
Frankie Howerd
The Barrow Boy
M
Madge Brindley
Large Lady (uncredited)
H
Hélène Burls
Hypatia (uncredited)
Kenneth Connor
Cab Driver (uncredited)
