Character Name : Agatha Christie

Original Name : Olivia Williams

Gender : Female

Character Name : Old Agatha Christie

Original Name : Anna Massey

Gender : Female

Character Name : Archie Christie

Original Name : Raymond Coulthard

Gender : Male

Character Name : Psychatrist

Original Name : Stephen Boxer

Gender : Male

Character Name : Hercule Poirot

Original Name : Anthony O'Donnell

Gender : Male

Character Name : Kenward

Original Name : Anthony O'Donnell

Gender : Male

Character Name : Kenyon

Original Name : Mark Gatiss

Gender : Male

Character Name : Gunman

Original Name : Richard Leaf

Gender : Male

Character Name : Young Agatha Christie

Original Name : Bonnie Wright

Gender : Female

Character Name : Agatha Christie's Mother

Original Name : Celia Montague

Gender : Male

Character Name : Reggie

Original Name : James Tucker

Gender : Male

Character Name : Carlo Fisher

Original Name : Vicki Pepperdine

Gender : Female

Character Name : Max Mallowan

Original Name : Bertie Carvel

Gender : Male

Character Name : Soldier

Original Name : Edmund Kingsley

Gender : Male

Character Name : Band Member

Original Name : Gregory Finnegan

Gender : Male

Character Name : Doctor Edward Armstrong

Original Name : Toby Stephens

Gender : Male

Character Name : Self (archive footage)

Original Name : Agatha Christie

Gender : Female