England, 1890s. The brutal and embittered Marquis of Queensberry, who believes that his youngest son, Bosie, has an inappropriate relationship with the famous Irish writer Oscar Wilde, maintains an ongoing feud with the latter in order to ruin his reputation and cause his fall from grace.
| Writing | John Furnell | Theatre Play |
| Directing | Ken Hughes | Director |
| Production | Albert R. Broccoli | Executive Producer |
| Directing | Ted Sturgis | Assistant Director |
| Camera | Nicolas Roeg | Camera Operator |
| Production | Irving Allen | Executive Producer |
| Production | Harold Huth | Producer |
| Editing | Geoffrey Foot | Editor |
| Camera | Ted Moore | Director of Photography |
| Sound | Ron Goodwin | Original Music Composer |
| Writing | Ken Hughes | Screenplay |
| Writing | Montgomery Hyde | Book |
| Art | Ken Adam | Production Design |
| Production | L. C. Rudkin | Production Manager |
| Sound | Norman Coggs | Sound Recordist |
| Sound | Wally Milner | Sound Mixer |
| Sound | Jim Groom | Sound Editor |
| Directing | Helen Whitson | Continuity |
| Costume & Make-Up | Paul Rabiger | Makeup Artist |
| Costume & Make-Up | Eileen Warwick | Hairdresser |
| Costume & Make-Up | Elsa Fennell | Wardrobe Supervisor |
| Production | James Liggat | Casting Director |
| Art | Bill Constable | Assistant Production Design |
| Art | Terence Morgan | Set Dresser |
