In 1940 Kenya as their country prepares for war, the local aristocratic social set lives a decadent, self-indulgent lifestyle, that leads to murder. The same events were also dramatised in the feature film White Mischief, which was released seven months after the first transmission of The Happy Valley.
| Sound | Geoffrey Burgon | Music |
| Production | Cedric Messina | Producer |
| Production | Chris Cherry | Associate Producer |
| Production | Terence Banks | Production Manager |
| Editing | Clare Douglas | Editor |
| Production | Antony Carrick | Production Manager |
| Art | Don Taylor | Production Design |
| Costume & Make-Up | Shirley Stallard | Makeup Artist |
| Costume & Make-Up | Odile Dicks-Mireaux | Costume Design |
| Crew | Nicholas Squires | Cinematography |
| Directing | Ross Devenish | Director |
| Camera | John Baker | Director of Photography |
