The Man Who Crossed Hitler

The Man Who Crossed Hitler is a 2011 BBC film set in Berlin in the summer of 1931, dramatising the true story in which lawyer Hans Litten subpoenas Adolf Hitler as a witness in the trial of some Nazi thugs. Hitler has formally renounced the use of political violence, and the young lawyer sees a chance to expose the Nazi leaders deceptions to the German establishment, thereby discrediting both Hitler and the Nazi Party. The film was given an alternative title Hitler on Trial which was used when the Public Broadcasting Service in the United States aired the work.

Source: Wikipedia