 | Rod Steiger Niall Hennessy |
 | Lee Remick Kate Brooke |
 | Richard Johnson Insp. Hollis |
 | Trevor Howard Comdr. Rice |
 | Peter Egan Williams |
 | Eric Porter Tobin |
 | Ian Hogg Gerry |
 | Stanley Lebor Hawk |
 | John Hallam Boyle |
 | Patrick Stewart Tilney |
 | David Collings Covey |
 | John Shrapnel Tipaldi |
 | Hugh Moxey Stephen Burgess, MP |
 | Margery Mason Housekeeper |
 | Paul Brennan Maguire |
 | Patsy Kensit Angie Hennessy |
 | Oliver Maguire Mick |
| Elizabeth Romilly Shop Assistant |
 | Charles Kay Westminster Guide |
 | Diana Fairfax Margaret Hennessy |
| Diana Fairfax Maureen Hennessy |
 | Peter Copley Home Secretary |
| Alan Barry Sgt Duggan |
 | Graham Ashley Police Commissioner |
 | Isolde Cazelet Mrs Hanagan |
| Paul Gregory Lieutenant |
 | Christopher Blake Young Soldier |
 | Paul Blake Rally Leader |
| Directing | |
| Don Sharp | Director |
Production | |
| Marilyn Clarke | Production Coordinator |
Sound | |
| David Stephenson | Boom Operator |
Crew | |
| Gerry Crampton | Stunt Coordinator |
Art | |
| Alf Pegley | Props |
Costume & Make-Up | |
| Jackie Cummins | Wardrobe Supervisor |
Sound | |
| Gerry Humphreys | Sound |
Production | |
| Tim Hampton | Production Supervisor |
| Stuart Freeman | Location Manager |
| Dennison Thornton | Publicist |
| Steve Previn | Production Executive |
Directing | |
| Barry Langley | Assistant Director |
Crew | |
| John Richardson | Special Effects |
Directing | |
| Mike Higgins | Second Assistant Director |
Camera | |
| Herbert Smith | Camera Operator |
Production | |
| Douglas Noakes | Production Accountant |
Camera | |
| Michael Temple | Assistant Camera |
Directing | |
| Anne Edwards | Continuity |
Sound | |
| Les Hammond | Sound |
Production | |
| Lesley Keane | Production Secretary |
Art | |
| Simon Wakefield | Set Dresser |
Sound | |
| Vernon Messenger | Sound Editor |
Camera | |
| Harry Gillard | Still Photographer |
Sound | |
| John Scott | Conductor |
Costume & Make-Up | |
| Camilla Farmer | Costume Coordinator |
Sound | |
| Ian MacGregor-Scott | Assistant Sound Editor |
Production | |
| Samuel Z. Arkoff | Executive Producer |
Art | |
| Bert Davey | Art Direction |
| Simon Wakefield | Set Decoration |
Costume & Make-Up | |
| Gerry Rex | Wigmaker |
Art | |
| Ray Simm | Production Design |
Sound | |
| John Scott | Original Music Composer |
Costume & Make-Up | |
| Tom Smith | Makeup Artist |
| Ronnie Cogan | Hairdresser |
Writing | |
| Richard Johnson | Original Story |
Production | |
| Irene Lamb | Casting |
Writing | |
| John Gay | Screenplay |
Crew | |
| Vic Armstrong | Stunts |
Editing | |
| Eric Boyd-Perkins | Editor |
Camera | |
| Ernest Steward | Director of Photography |
Production | |
| Peter Snell | Producer |
