- Thomas Kretschmann as Dr. Alexander
- Agathe de la Boulaye as Dr. Juliette Marceau
- Géraldine Pailhas as Sylvie Marceau
- Jean Douchet as Le moine encapuchonné
- Grégoire Colin as Vincent Marceau
- Grégori Derangère as Vincent, enfant
- Julie-Marie Parmentier as Jeanne, la mère
- André Wilms as Le passeur
- Michel Galabru as Le père d'Alexander
- Isabelle Sadoyan as La mère d'Alexander
- Olivier Gourmet as Le chirurgien
- Dominique Reymond as L'infirmière
- Patrick Bonnel as Le radiologue
- Isabelle Candelier as La psychologue