Nigel Havers as Self - Narrator (voice)

Agatha Christie as Self - Writer (archive footage)

Samantha Bond as Self - Actor

Sheila Atim as Self - Actor

Philip Jackson as Self - Inspector Japp, ITV's Poirot

Hugh Fraser as Self - Lt. Hastings, ITV's Poirot

Anthony Horowitz as Self - Screenwriter and Author

James Prichard as Self - Agatha Christie's great grandson

Amanda Abbington as Self - Actor

Damien Timmer as Self - Executive Producer, Agatha Christie adaptations

Mark Aldridge as Self - Author

Laura Thompson as Self - Agatha Christie's Biographer

Sophie Hannah as Self - Author, Poirot Sequels

John Risdon as Self - Torquay Historian

Basi Akpabio as Self - Creative Director, Agatha Christie Ltd

Belinda Smith as Self - Agatha Christie's home, Greenway