Alfred Hitchcock (Spectator at Opening Rally (uncredited)),
Michael Bates (DS Spearman),
John Boxer (Sir George),
Bernard Cribbins (Felix Forsythe),
Jon Finch (Richard Ian "Dick" Blaney),
Barry Foster (Robert "Bob" Rusk),
Jimmy Gardner (Bertie),
Noel Johnson (Doctor in Pub),
Barbara Leigh-Hunt (Brenda Margaret Blaney),
Jean Marsh (Monica Barling),
Anna Massey (Barbara Jane "Babs" Milligan),
Alec McCowen (DCI Tim Oxford),
Vivien Merchant (Mrs Oxford),
Elsie Randolph (Gladys),
Madge Ryan (Mrs Davison),
Gerald Sim (Usher - Solicitor in Pub),
Clive Swift (Johnny Porter),
George Tovey (Neville Salt),
Billie Whitelaw (Hetty Porter), Lewis Alexander (Man in Crowd (uncredited))