Adaptation by Joy Wilkinson of Agatha Christie's detective novel. Lady Tresselian is discovered murdered in her bed, leaving everyone in the house party very distressed. Inspector Leach leads the investigation. Nevile ...... Hugh Bonneville MacWhirter ...... Tom Mannion Audrey ...... Claire Rushbrook Kay ...... Lizzy Watts Royde ...... Stephen Hogan Inspector Leach ...... Philip Fox Latimer ...... Joseph Kloska Sergeant ...... Matt Addis Doctor Lazenby ...... Benjamin Askew Constable ...... David Hargreaves Directed by Mary Peate.