"Novelist, actor, director and Oscar-winning screenwriter Julian Fellowes (Gosford Park) dons his sleuthing hat and snoops around in five unsolved, century-old murder cases in this BBC miniseries. Cases include the poisoning of a newlywed barrister, the stabbing of a pregnant girl, the shooting of a philandering earl in Kenya, the murder of a wealthy mill owner and the arsenic-induced deaths of an entire family."