Charles Dobbs is a British secret agent investigating the apparent suicide of Foreign Office official Samuel Fennan. Dobbs suspects that Fennan's wife, Elsa, a survivor of a Nazi Germany extermination camp, might have some clues, but other officials want Dobbs to drop the case. So Dobbs hires a retiring inspector, Mendel, to quietly make inquiries. Dobbs isn't at all sure as there are a number of anomalies that simply can't be explained away. Dobbs is also having trouble at home with his errant wife, whom he very much loves, having frequent affairs. He's also pleased to see an old friend, Dieter Frey, who he recruited after the war. With the assistance of a colleague and a retired policeman, Dobbs tries to piece together just who is the spy and who in fact assassinated Fennan.
You can now watch The Deadly Affair online on the following streaming providers in the United States.
| Directing | Sidney Lumet | Director |
| Production | Sidney Lumet | Producer |
| Writing | Paul Dehn | Screenplay |
| Camera | Freddie Young | Director of Photography |
| Editing | Thelma Connell | Editor |
| Sound | Quincy Jones | Original Music Composer |
| Production | Denis O'Dell | Associate Producer |
| Production | James Liggat | Casting |
| Art | John Howell | Art Direction |
| Costume & Make-Up | Cynthia Tingey | Costume Design |
| Sound | Chris Greenham | Sound Editor |
| Camera | Brian West | Camera Operator |
| Lighting | Jock Napper | Gaffer |
| Costume & Make-Up | Betty Glasow | Hairstylist |
| Costume & Make-Up | Jill Carpenter | Makeup Artist |
| 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 |
