Eric Till Director Joseph Fiennes Martin Luther Actor Alfred Molina John Tetzel Actor Jonathan Firth Girolamo Aleander Actor Claire Cox Katharina von Bora Actor Peter Ustinov Frederick the Wise Actor Bruno Ganz Johann von Staupitz Actor Uwe Ochsenknecht Pope Leo X Actor Mathieu Carrière Cardinal Cajetan Actor Benjamin Sadler Spalatin Actor Jochen Horst Professor Carlstadt Actor Torben Liebrecht Charles V Actor Brigitte Rochow Producer Christian P. Stehr Producer Alexander Thies Producer Dennis A. Clauss Executive Producer Kurt Rittig Executive Producer Gabriela Pfandner Executive Producer J. Dan Nichols Executive Producer Camille Thomasson Writer Bart Gavigan Writer