Luther Adler
— Rudi Janus / Janus the Great / Adolf Hitler
Patricia Knight
— Vera Janus
William L. Shirer
— Narrator (voice)
Ilka Windish
— Carla Harbach
Heinz Moog
— Hans Harbach
Peter Preses
— Warden Harbacker
Manfred Inger
— Heinrich Wagner
Jaspar von Oertzen
— Maj. Fritz Weinrich
Charles Koenig
— Franz, Warden's clerk
Anton Mitterwurzer
— Hans (Janus' valet)
Annie Maiers
— Mariana
Hermann Erhardt
— Goering
Rolf Wanka
— General Rodenbusch
Oskar Willner
— General von Schlossen