 Jon FinchRichard Ian "Dick" Blaney | Richard Ian "Dick" Blaney |
 Barry FosterRobert "Bob" Rusk | Robert "Bob" Rusk |
 Barbara Leigh-HuntBrenda Margaret Blaney | Brenda Margaret Blaney |
 Anna MasseyBarbara Jane "Babs" Milligan | Barbara Jane "Babs" Milligan |
 Alec McCowenDCI Tim Oxford | DCI Tim Oxford |
 Vivien MerchantMrs Oxford | Mrs Oxford |
 Billie WhitelawHetty Porter | Hetty Porter |
 Clive SwiftJohnny Porter | Johnny Porter |
 Bernard CribbinsFelix Forsythe | Felix Forsythe |
 Michael BatesDS Spearman | DS Spearman |
 Jean MarshMonica Barling | Monica Barling |
| JJohn BoxerSir George | Sir George |
| MMadge RyanMrs Davison | Mrs Davison |
 George ToveyNeville Salt | Neville Salt |
 Elsie RandolphGladys | Gladys |
 Jimmy GardnerBertie | Bertie |
 Gerald SimUsher - Solicitor in Pub | Usher - Solicitor in Pub |
| NNoel JohnsonDoctor in Pub | Doctor in Pub |
 Alfred HitchcockSpectator at Opening Rally (uncredited) | Spectator at Opening Rally (uncredited) |
| LLewis AlexanderMan in Crowd (uncredited) | Man in Crowd (uncredited) |
| BBrian BadcoeMan in Crowd (uncredited) | Man in Crowd (uncredited) |
 Michael BiltonTrial Jury Foreman (uncredited) | Trial Jury Foreman (uncredited) |
| JJoby BlanshardMan in Crowd (uncredited) | Man in Crowd (uncredited) |
| WWilly BowmanMan in Crowd (uncredited) | Man in Crowd (uncredited) |
 Jim BradyJuror (uncredited) | Juror (uncredited) |
| DDonald CampbellThe Mayor (uncredited) | The Mayor (uncredited) |
| JJohn CannonMurder Scene Policeman (uncredited) | Murder Scene Policeman (uncredited) |
 John CaterMan in Crowd (uncredited) | Man in Crowd (uncredited) |
| PPauline ChamberlainWoman in Crowd (uncredited) | Woman in Crowd (uncredited) |
| TTerence ConoleyMan in Crowd (uncredited) | Man in Crowd (uncredited) |
