Trailer
Images
 | Jack Hawkins as Insp. George Gideon |
 | Anna Lee as Mrs. Kate Gideon |
 | Anna Massey as Sally Gideon |
 | Andrew Ray as PC Simon Farnaby-Green |
 | Dianne Foster as Joanna Delafield |
 | Cyril Cusack as Herbert 'Birdie' Sparrow |
 | James Hayter as Robert Mason |
 | Derek Bond as Det. Sgt. Eric Kirby |
 | Howard Marion-Crawford as The Chief |
 | John Loder as Ponsford 'The Duke' |
 | Barry Keegan as Riley |
 | Frank Lawton as Det. Sgt. Liggot |
 | Michael Trubshawe as Sergeant Golightly |
 | Grizelda Hervey as Mrs. Kirby |
 | Henry B. Longhurst as Rev. Mr. Courtney |
 | Jack Watling as Rev. Julian Small |
| Maureen Potter as Mrs. Ethel Sparrow |
 | Donal Donnelly as Feeney |
 | Dervis Ward as Simmo |
 | Marjorie Rhodes as Mrs. Saparelli |
 | Laurence Naismith as Arthur Sayer |
 | Miles Malleson as The Judge |
 | Ronald Howard as Paul Delafield |
| David Aylmer as Manners |
| Brian Smith as White-Douglas |
| James Hayter as Mason |
 | Michael Shepley as Sir Rupert Bellamy |
 | Joan Ingram as Lady Bellamy |
 | John Le Mesurier as Barrister (uncredited) |
 | Yvonne Mitchell as Policewoman (uncredited) |
| Directing | |
| John Ford | Director |
Writing | |
| John Creasey | Novel |
Production | |
| Bill Kirby | Production Supervisor |
| Wingate Smith | Associate Producer |
Sound | |
| Douglas Gamley | Original Music Composer |
Art | |
| Ken Adam | Art Direction |
Editing | |
| Raymond Poulton | Editor |
Writing | |
| T. E. B. Clarke | Screenplay |
Production | |
| Michael Killanin | Producer |
Camera | |
| Freddie Young | Director of Photography |
Costume & Make-Up | |
| Charles Nash | Makeup Artist |
