- Jack Hawkins
- Chief Inspector George Gideon
- Anna Lee
- Mrs.Kate Gideon
- Anna Massey
- Sally Gideon
- Andrew Ray
- P.C.Simon Farnaby-Green
- Howard Marion-Crawford
- The Chief
- John Loder
- Ponsford 'The Duke'
- Barry Keegan
- Riley
- Frank Lawton
- Det. Sgt. Liggot
- Michael Trubshawe
- Sergeant Golightly
- Derek Bond
- Det. Sgt. Eric Kirby
- Grizelda Hervey
- Mrs. Kirby
- Henry B. Longhurst
- Rev Mr. Courtney
- Doreen Madden
- Miss Courtney
- Jack Watling
- Reverend Julian Small
- Cyril Cusack
- Herbert 'Birdie' Sparrow
- Maureen Potter
- Mrs. Ethel Sparrow
- Donal Donnelly
- Feeney
- Dervis Ward
- Andy 'Simmo' Simpson
- Marjorie Rhodes
- Mrs. Rosie Saparelli
- Hermione Bell
- Dolly Saparelli
- Laurence Naismith
- Arthur Alexander Sayer
- Charles Maunsell
- James Norman Walker
- Miles Malleson
- Judge Cecil Birkenshaw
- Dianne Foster
- Joanna Delafield
- Ronald Howard
- Paul Delafield
- Francis Crowdy
- Fitzhubert
- David Aylmer
- Ray Manners
- Brian Smith
- White-Douglas
- James Hayter
- Robert Mason
- Michael Shepley
- Sir Rupert Bellamy
- Joan Ingram
- Lady Bellamy
- Bart Allison
- Policeman
- William Baskiville
- Duty Officer
- Alan Beaton
- Police Doctor
- Ernest Blyth
- City Gent in Pub
- Jim Brady
- Plain Clothes Policeman
- Daniel Brown
- Cinema Patron
- Robert Bruce
- Defending Barrister
- Jimmy Charters
- Workman
- Diana Chesney
- Barmaid
- Dan Cressey
- Constable
- George Curtis
- Constable
- Arthur Dibbs
- Counsel
- Mary Donevan
- Usherette
- Harry Drew
- Man in Crowd / Constable / Another Man in Crowd (uncredited)
- Patrick Ellis
- Minor Role
- Anthony Faramus
- Man in Crowd
- Lee Fenton
- Man in Crowd
- Nigel Fitzgerald
- Insp. Cameron
- Peter Godsell
- Jimmy
- Helen Goss
- Woman Employer
- Alex Graham
- Court Official
- Lucy Griffiths
- Cashier
- Stewart Guidotti
- Minor Role
- Pat Hagan
- Court Official
- Patrick Halpin
- Detective
- Victor Harrington
- Bystander
- Gordon Harris
- CID Man
- Lindsay Hooper
- Man at Tube Station
- Alastair Hunter
- Employer #2
- James Langley
- Minor Role
- John Le Mesurier
- Prosecuting Barrister
- Richard Leech
- Minor Role
- Dan Lester
- Clerk of the Court
- Alf Mangan
- Man in Cinema
- Jack May
- Pub Patron
- Colin McKenzie
- Constable
- Michael O'Duffy
- Policeman
- Derek Prentice
- Employer #1
- Robert Raglan
- Dawson
- Malcolm Ranson
- Ronnie Gideon
- Mavis Ranson
- Jane Gideon
- Susan Richmond
- Aunt May
- Alan Rolfe
- CID Man at Hospital
- Raymond Rollett
- Uncle Dick
- Peggy Scott Sanders
- Woman in Crowd
- Stuart Saunders
- Chancery Lane Policeman
- Michael Scoble
- Minor Role
- Hennie Scott
- Minor Role
- Laurence Shiel
- Policeman
- Jack Silk
- Constable
- Alecia St Leger
- Casino Patron
- David Storm
- Court Clerk
- Martin Voss
- Man in Cinema
- Robert Vossler
- Constable
- John Warwick
- Inspector Gillick
- Billie Whitelaw
- Christine
- Peter Wood
- Minor Role
