Raymond Coulthard
Archie Christie
Anna Massey
Old Agatha Christie
Toby Stephens
Doctor Edward Armstrong
Bonnie Wright
Young Agatha Christie
Olivia Williams
Agatha Christie
Richard Leaf
Gunman
Mark Gatiss
Kenyon
Agatha Christie
Self (archive footage)
Stephen Boxer
Psychatrist
Anthony O'Donnell
Hercule Poirot
Anthony O'Donnell
Kenward
Bertie Carvel
Max Mallowan
Edmund Kingsley
Soldier
Vicki Pepperdine
Carlo Fisher
James Tucker
Reggie