Sir Anthony Blunt, who was a Soviet agent for 25 years, is routinely questioned and gives no answers, but is knighted and works as Director of the Courtauld Institute, and presents his interrogator with a puzzle in the shape of a doubtful Titian painting. He also does art restoration work in Buckingham Palace, where he gets into an interesting conversation with HMQ.
| Writing | Alan Bennett | Writer |
| Directing | John Schlesinger | Director |
| Costume & Make-Up | Amy Roberts | Costume Design |
| Editing | Mark Day | Editor |
| Production | Innes Lloyd | Producer |
| Art | Barbara Gosnold | Production Design |
| Sound | Gerald Gouriet | Original Music Composer |
| Production | Anne Hopkinson | Casting |
| Production | Richard Broke | Executive Producer |
| Production | Jeremy Zimmermann | Casting |
| Camera | John Hooper | Director of Photography |
| Production | Noel Davis | Casting |
