- Alec Guinness
- Holland
- Stanley Holloway
- Pendlebury
- Sidney James
- Lackery
- Alfie Bass
- Shorty
- Marjorie Fielding
- Mrs. Chalk
- Edie Martin
- Miss Evesham
- John Salew
- Parkin
- Ronald Adam
- Turner
- Arthur Hambling
- Wallis
- Gibb McLaughlin
- Godwin
- John Gregson
- Farrow
- Clive Morton
- Station Sergeant
- Sydney Tafler
- Clayton
- Marie Burke
- Senora Gallardo
- Audrey Hepburn
- Chiquita
- William Fox
- Gregory
- Michael Trubshawe
- British Ambassador
- Ann Heffernan
- Kiosk Girl
- Jacques B. Brunius
- Customs Official
- Eugene Deckers
- Customs Official
- Paul Demel
- Customs Official
- Andreas Malandrinos
- Customs Official
- Cyril Chamberlain
- Commander
- Tony Quinn
- Deputy Commander
- Moultrie Kelsall
- Detective Superintendant
- Christopher Hewett
- Inspector Talbot
- Meredith Edwards
- P.C. Williams
- Patrick Barr
- Divisional Detective Inspector
- David Davies
- City Policeman
- John Adams
- Policeman
- Ernest Blyth
- Police Sergeant
- Alanna Boyce
- June Edwards
- Jim Brady
- Tube Train Passenger
- Johnny Briggs
- Small Role
- Daniel Brown
- Man in Police Line Up
- Peter Bull
- Joe the Gab
- Jacques Cey
- Minor Role
- Joe Clarke
- Minor Role
- Robert Coote
- Waiter in Restaurant
- Jacqueline Curtis
- Schoolgirl
- Richard Davies
- Police Driver
- Patric Doonan
- Craggs
- Archie Duncan
- Chief Cashier
- Norman Fisher
- Commuter
- Frank Forsyth
- Minor Role
- Rex Garner
- Rio Club Waiter
- Patricia Garwood
- Girl
- Fred Griffiths
- Taxi Driver
- Victor Hagan
- Passerby
- Eileen Harvey
- School Mistress
- Ned Hood
- Vicar / Policeman (uncredited)
- Gerry Judge
- Rio Club Member
- Charles Lamb
- Mr. Richards
- Howard Lang
- Policeman at Window
- Desmond Llewelyn
- Customs Officer
- Martin Lyder
- Waiter
- Cyril Lyons
- A Policeman
- Louis Matto
- Gendarme
- Manny Michael
- Man in Police Line-Up
- Arthur Mullard
- 1st Man in Police Identity Parade
- Marie Ney
- School Headmistress
- Fred Nicholas
- Police Driver
- Joe Phelps
- Policeman
- Frederick Piper
- Cafe Owner
- Ernie Priest
- Policeman
- Ernie Rice
- Man at Races
- Johnny Rossi
- Man in Police Line Up
- Robert Shaw
- Chemist at Police Exhibition
- Valerie Singleton
- Girl
- George Spence
- Racegoer
- John Warwick
- Police Inspector at Squad Car Headquarters
- Richard Wattis
- Opposition MP
- George Wilson
- Member of Parliament
- Neil Wilson
- Squad Car Headquarters PC
