Samuel Fennan, diensthoofd op het Ministerie van Buitenlandse Zaken, wordt ervan verdacht banden te hebben met de Oostbloklanden en pleegt zelfmoord. De Britse overheid wil een schandaal vermijden en geeft geheim agent Charles Dobbs opdracht de zaak discreet te onderzoeken. Dobbs ontdekt echter een aantal curieuze feiten.
Nee, helaas is The Deadly Affair nog niet beschikbaar op Netflix in Nederland.
| Editing | Thelma Connell | Editor |
| Camera | Freddie Young | Director of Photography |
| Sound | Quincy Jones | Original Music Composer |
| Production | Sidney Lumet | Producer |
| Directing | Sidney Lumet | Director |
| Writing | Paul Dehn | Screenplay |
| Costume & Make-Up | Jill Carpenter | Makeup Artist |
| Lighting | Jock Napper | Gaffer |
| Costume & Make-Up | Betty Glasow | Hairstylist |
| Sound | Chris Greenham | Sound Editor |
| Costume & Make-Up | Cynthia Tingey | Costume Design |
| Production | James Liggat | Casting |
| Production | Denis O'Dell | Associate Producer |
| Art | John Howell | Art Direction |
| Camera | Brian West | Camera Operator |
| Art | Percy Godbold | Property Buyer |
| Writing | John le Carré | Novel |
| Art | Pamela Cornell | Set Dresser |
| Directing | Ted Sturgis | Assistant Director |
| Camera | Kenneth J. Withers | Focus Puller |
| Sound | Gerry Humphreys | Sound Recordist |
| Sound | Les Hammond | Sound Recordist |