The Case of Colonel Redl (German: Der Fall des Generalstabs-Oberst Redl) is a 1931 Czechoslovak spy drama film directed by Karl Anton in German language. It stars Theodor Loos, Lil Dagover and Otto Hartmann. It was a co-production between the Prague-based companies Elektafilm and Sonor Film. A separate Czech-language version The Affair of Colonel Redl was also shot at the same time. It was based on a 1924 book of the same title by Egon Erwin Kisch, detailing the story of Alfred Redl.
In the years leading up to the First World War, Colonel Redl of the Austrian army acts as a double agent for enemy powers.