Still in the formative years of his career, Hercule Poirot faces a most taxing case: who killed Lord Cronshaw? Was Coco Courtenay's death on the same night a mere coincidence? And did she deliberately take an overdose of cocaine?

Carla Lemarchant was a child of five when her mother was accused and convicted of poisoning her father, the famous painter Amyas Crale. After Caroline Crale dies in prison, Carla is sent to live with her uncle and aunt in Canada. Only on her 21st birthday does Carla learn of her family history when she reads a letter written by Caroline before her death, in which she denies murdering her husband. But if her mother didn't kill Amyas Crale, who did?

This is the very first Poirot/Hastings story. Set in 1916, we meet Captain Hastings as he is invalided out of the Great War and goes to convalesce at Styles Court, the family home of his great friend, John Cavendish. By an extraordinary coincidence, billeted in the village is a brilliant little retired detective with an egg-shaped head, who made a considerable impression on the Captain when he was in Belgium. Styles is not a happy household and in the blistering summer heat, tensions mount.

Lady Tresselian invites several guests to stay at her seaside house at Gull’s Point. Against her better judgment she has allowed her late husband’s ward, handsome tennis ace Neville Strange, and his wife Kay to come at the same time as Neville’s ex-wife Audrey. Other guests include Mary, Lady Tresselian’s companion; Ted, Kay’s ever-present friend; Thomas, a family friend who has just returned from spending the war in Africa and Lady Tresselian’s old friend Lord Justice Treves.

A BBC Radio 4 full-cast dramatisation of a classic Agatha Christie mystery, starring Lyndsey Marshal, Geoffrey Whitehead and John Rowe. Ten guests travel to an island at the invitation of someone named U. N. Owen. All are strangers, but they have two things in common: they have all been responsible for someone's death, and none will leave the island alive.