Martin Luther
Niall MacGinnis
Vicar von Staupitz
John Ruddock
Cardinal Alexander
Egon Strohm
Katherine von Bora (as Annette Carrell)
Annette Carell
Tetzel
Alexander Gauge
Henry Oscar
Brueck
Irving Pichel
Spalatin
Pierre Lefevre
Melanchthon
Guy Verney
Carlstadt
Alastair Hunter
Duke Frederick
David Horne
Prior
Fred Johnson
Pope Leo X
Philip Leaver
Dr. Eck
Heinz Piper
Emissary
Leonard White
Director
Producer
Lothar Wolff
Cinematography
Joseph C. Brun
Editor
Fritz Stapenhorst
Music
Mark Lothar
Writer
Allan Sloane
Executive Producer
Robert E. A. Lee