Ten strangers are invited as weekend guests to a remote mountain mansion. When the host doesn't show up, the guests start dying, one by one, in uniquely macabre Agatha Christie-style. It is based on Christie's best-selling novel with 100 million sales to date, making it the world's best-selling mystery ever, and one of the most-printed books of all time.

• Tenlit Films
• Towers of London Productions
• Hugh O'Brian
• Shirley Eaton
• Fabian
• Leo Genn
• Stanley Holloway
• Wilfrid Hyde-White
• Daliah Lavi
• Dennis Price