A strange young man has a sinister effect on the family of a middle-aged writer.
| Editing | Paul Green | Editor |
| Directing | Richard Loncraine | Director |
| Production | Alan E. Salke | Producer |
| Writing | Dennis Potter | Screenplay |
| Production | Herbert F. Solow | Producer |
| Production | Kenith Trodd | Producer |
| Camera | Peter Hannan | Director of Photography |
| Writing | Dennis Potter | Original Story |
| Art | Milly Burns | Production Design |
| Art | Norman Garwood | Art Direction |
| Costume & Make-Up | Shuna Harwood | Costume Design |
