Agatha Christie's Why Didn't They Ask Evans? starts during a round of golf on a cliff-top course in Wales, when Bobby Jones discovers a man lying gravely injured on the rocks below. "Why didn't they ask Evans?" croaks the dying man. What follows is a tale of murder, suspense, intrigue, and false identities as amateur sleuths Bobby and Frankie Derwent set about unlocking the mystery behind those enigmatic last words. TV's Tommy & Tuppence, James Warwick and Francesca Annis, play another witty crime-solving pair created by Agatha Christie. Also featuring John Gielgud and Eric Porter.