Cast
- Basil Ruysdael as Narrator
- Pope Pius XI as Self
- Pope Pius XII as Self (also as Cardinal Eugenio Pacelli)
- Cardinal William O'Connell as Self
- Cardinal Dennis Dougherty as Self
- Cardinal Patrick Joseph Hayes as Self
- Cardinal George Mundelein as Self
- Cardinal Pietro Gasparri as Self
- Benito Mussolini as Self
- Guglielmo Marconi as Self
Crew
- Allyn Butterfield · Director
- Allyn Butterfield · Writer
- George S. Jeffrey · Producer