Cast
- Erich Auer as Oberst Alfred Redl
- Hanns Obonya as Oberst August Urbanski von Ostrymiecz
- Helmut Janatsch as Generalmajor Franz Ritter Höfer von Feldsturm
- Erich Padalewski as Wagner
- Edd Stavjanik as Generalstaatsanwalt Dr. Victor Pollak
- Hannes Schiel as Regierungsrat Gayer