Oberst Alfred Redl heads the military intelligence department of the Austro-Hungarian monarchy. Frequent letters from the Russian Empire, however, make him suspect of sharing his knowledge with unauthorized authorities.

• Ewald Balser
• Barbara Rütting
• Gerhard Riedmann
• Oskar Werner
• Marte Harell
• Hannelore Bollmann
• Rudolf Forster
• Attila Hörbiger