| Person | Type | Job | Role(s) |
|---|---|---|---|
 Angela Allen | Crew | Directing | Continuity |
Anthony Mendleson | Crew | Costume & Make-Up | Costume Design |
Antony Gibbs | Crew | Editing | Editor |
Clive Egleton | Crew | Writing | Novel |
David Brown | Crew | Production | Executive Producer |
Dewi Humphreys | Crew | Camera | Focus Puller |
 Don Siegel | Crew | Directing | Director, Producer |
Eva Monley | Crew | Production | Production Manager |
Freddie Williamson | Crew | Costume & Make-Up | Makeup Artist |
Gerry Humphreys | Crew | Sound | Sound Recordist |
James Devis | Crew | Camera | Camera Operator |
John W. Mitchell | Crew | Sound | Sound Recordist |
Nobby Cross | Crew | Lighting | Gaffer |
Ousama Rawi | Crew | Camera | Director of Photography |
Peter Murton | Crew | Art | Art Direction |
 Richard D. Zanuck | Crew | Production | Executive Producer |
Rosemary Burrows | Crew | Costume & Make-Up | Wardrobe Supervisor |
Roy Budd | Crew | Sound | Original Music Composer |
Scott Hale | Crew | Production | Associate Producer |
Les Wiggins | Crew | Sound | Sound Editor |
Kip Gowans | Crew | Directing | Assistant Director |
Leigh Vance | Crew | Writing | Screenplay |
Colin Davidson | Crew | Camera | Clapper Loader |
 Brenda Cowling | Cast | Actress | Secretary (uncredited) |
 Catherine Schell | Cast | Actress | Lady Melissa Julyan |
 Clive Revill | Cast | Actor | Alf Chestermann |
 David Daker | Cast | Actor | MI5 Man |
 Del Baker | Cast | Actor | Shadow (uncredited) |
 Delphine Seyrig | Cast | Actress | Ceil Burrows |
 Denis Quilley | Cast | Actor | Bateson |
 Derek Newark | Cast | Actor | Monitoring Policeman |
 Donald Pleasence | Cast | Actor | Cedric Harper |
 Edward Hardwicke | Cast | Actor | Mike McCarthy |
George Lane Cooper | Cast | Actor | Pincus (uncredited) |
 Hermione Baddeley | Cast | Actress | Hetty |
 Janet Suzman | Cast | Actress | Alex Tarrant |
 John Vernon | Cast | Actor | McKee |
 Joseph O'Conor | Cast | Actor | Sir Edward Julyan |
 Joss Ackland | Cast | Actor | Chief Supt. Wray |
 Joyce Carey | Cast | Actress | Miss Monley |
Maureen Pryor | Cast | Actress | Jane Harper |
 Michael Caine | Cast | Actor | Maj. John Tarrant |
Molly Urquhart | Cast | Actress | Margaret |
Murray Brown | Cast | Actor | Doctor (uncredited) |
 Patrick Barr | Cast | Actor | Gen. St. John |
 Peter Halliday | Cast | Actor | Customs Officer (uncredited) |
 Robert Dorning | Cast | Actor | Jeweller (uncredited) |
 Yves Afonso | Cast | Actor | Jacques (uncredited) |
Preston Lockwood | Cast | Actor | Ilkeston |
Nancy Gabrielle | Cast | Actress | Manageress (uncredited) |
 Jill Goldston | Cast | Actress | Commuter (uncredited) |
Roy Everson | Cast | M15 Man (uncredited) | |
Les Conrad | Cast | M15 Man (uncredited) | |
Charlie Gray | Cast | Actor | Tourist (uncredited) |
| Person | Type | Job | Role(s) |
