British Broadcasting Corporation

In Agatha Christie's classic, Three Act Tragedy, the normally unflappable Hercule Poirot faces his most baffling investigation: the seemingly motiveless murder of the thirteenth guest at dinner party, who choked to death on a cocktail containing not a trace of poison. Sir Charles Cartwright should have known better than to allow thirteen guests to sit down for dinner. For at the end of the evening one of them is dead-choked by a cocktail that contained...

Return to post-war England for mystery and a cup of tea. The consummate prim and proper crime-fighting spinster, Miss Jane Marple sets down her knitting needles to unwind the most ingenious crimes. As she travels from city to countryside and even the Bahamas, murders, missing bodies and haunted dreams have a habit of falling accross Miss Marple's path.

A series of sinister terror strikes, combined with severe fuel shortages, has plunged Britain into crisis. As a chronically weakened prime minister fights to hold onto power, the public mood turns increasingly anarchic. MI-5 supremo Harry Pearce and team leader Adam Carter begin to face the horrifying possibility that the country is under attack from sinister forces right at the heart of the establishment.