Gilles Kneusé
The director
Peter Hudson
Dr. Sheppard
Gilles Gaston-Dreyfus
Hercule Poirot
Célia Catalifo
Flora Ackroyd
Vincent Deslandres
Ghislain de Fonclare
François Lequesne
Carole Rochelle
Mrs. Ferrars
Héloïse Rauth
Caroline Sheppard
Benjamin Tholozan
Julien Urrutia
Pierre Bayard
Self - Professor of literature
Denis Bertrand
Self - Semiotician
Neel Burton
Self - Psychiatrist
Georges Moréas
Self - Former chief of police
Malcolm Neesam
Self - Historian
Andrew Norman
Self - Writer
François Rivière
Self - Writer
Agatha Christie
Self (archive footage)
Joanna Grudzinska
Ursula Bourne
Gérard Dessalles
(voice)
Enrico Di Giovanni
(voice)
Jean-Gabriel Nordmann
(voice)