- Madge Brindley - Large Lady (uncredited)
- Hélène Burls - Hypatia (uncredited)
- Kenneth Connor - Cab Driver (uncredited)
- Michael Corcoran - Burglar (uncredited)
- Harold Goodwin - Parcels Clerk (uncredited)
- Fred Griffiths - Junk Man (uncredited)
- Lucy Griffiths - Miss Pringle (uncredited)
- George Hilsdon - Security Van Driver (uncredited)
- Vincent Holman - Station Master (uncredited)
- Stratford Johns - Security Guard (uncredited)
- Sam Kydd - Second Cab Driver (uncredited)
- Edie Martin - Lettice (uncredited)
- Jack Melford - Detective (uncredited)
- Arthur Mullard - (uncredited)
- Ewan Roberts - Constable (uncredited)
- George Roderick - Radio Car Policeman (uncredited)
- John Rudling - Nervous Man (uncredited)
- Leonard Sharp - Pavement Artist (uncredited)
- Peter Williams - Detective at Parcels Office (uncredited)
- Neil Wilson - Policeman (uncredited)
- Phoebe Hodgson - Constance (uncredited)
- Tom Pevsner
- Alexander Mackendrick
- William Rose
- William Rose
- Jimmy O'Connor
- Michael Balcon
- Dock Mathieson
Alec Guinness hace el papel de Professor Marcus.
Cecil Parker hace el papel de Claude, alias 'Major Courtney'.
Herbert Lom interpreta a Louis, alias 'Mr. Harvey' en la película.
Peter Sellers hace el papel de Harry, alias 'Mr. Robinson'.
Danny Green interpreta a 'One-Round', alias 'Mr. Lawson' en la película.
Katie Johnson hace el papel de Mrs. Wilberforce.
Jack Warner interpreta a The Superintendent en la película.
Philip Stainton hace el papel de The Sergeant.
Frankie Howerd interpreta a The Barrow Boy en la película.
Madge Brindley interpreta a Large Lady (uncredited) en la película.
Hélène Burls interpreta a Hypatia (uncredited) en la película.
Kenneth Connor hace el papel de Cab Driver (uncredited).
Michael Corcoran hace el papel de Burglar (uncredited).
Harold Goodwin interpreta a Parcels Clerk (uncredited) en la película.
Fred Griffiths hace el papel de Junk Man (uncredited).
Lucy Griffiths hace el papel de Miss Pringle (uncredited).
George Hilsdon hace el papel de Security Van Driver (uncredited).
Vincent Holman interpreta a Station Master (uncredited) en la película.
Stratford Johns interpreta a Security Guard (uncredited) en la película.
Sam Kydd interpreta a Second Cab Driver (uncredited) en la película.
Edie Martin interpreta a Lettice (uncredited) en la película.
Jack Melford interpreta a Detective (uncredited) en la película.
Arthur Mullard interpreta a (uncredited) en la película.
Ewan Roberts hace el papel de Constable (uncredited).
George Roderick interpreta a Radio Car Policeman (uncredited) en la película.
John Rudling interpreta a Nervous Man (uncredited) en la película.
Leonard Sharp interpreta a Pavement Artist (uncredited) en la película.
Peter Williams interpreta a Detective at Parcels Office (uncredited) en la película.
Neil Wilson interpreta a Policeman (uncredited) en la película.
Phoebe Hodgson hace el papel de Constance (uncredited).
Capítulo disponible en las siguientes plataformas:
