Sir Clive Chiddingfield invites his family to his birthday party at lonely Moorstones Manor but in the course of the evening half of those present are murdered one by one and the remaining survivors except for Lady Chiddingfield each admit to being the killer,eventually shooting each other.
| Actor | Role |
|---|---|
 Isabel DeanLady Chiddingford | Lady Chiddingford |
 Michael PalinCharles Chiddingford | Charles Chiddingford |
 Iain CuthbertsonDr. Farson | Dr. Farson |
 Frank MiddlemassFather | Father |
 Harold InnocentManners | Manners |
 Candace GlendenningDora | Dora |
| SStuart FellStunt | Stunt |