- Santi Bayón - Roberto Vasquez IV (Henry's Dad)
- Paloma Bloyd - Interpreter
- Alessandro Gruttadauria - Father Gianni
- River Hawkins - Enzo / Halphas
- Jordi Collet - Carlos
- Carrie Munro - Adella
- Marc Velasco - Worker 1
- Edward Harper-Jones - Young Amorth
- Matthew Sim - Cardinal Abato
- Victor Solé - Spanish Doctor
- Tom Bonington - Vatican Doctor
- Andrea Dugoni - Drunken Farmer
- Ed White - Nazi Soldier
- Laila Barwick - Daughter (Farmhouse)
- Gennaro Diana - Italian Priest
- Pablo Raybould - Bishop Barbuto
- Ralph Ineson - Asmodeus (voice)
- Derek Carroll - Doctor
- Ella Cannon - Partisan
- Rachel Morgan
- James McGrady
- Silvia Bellitto
- Gabriele Amorth
- Anne McCarthy
- Simon Higgins
- Jeff Katz
- Dan Hubbard
- Julia McCarthy
- Amy Barber
- Jed Kurzel
- Matt Yocum
Capítulo disponible en las siguientes plataformas: