Appointment in Berlin

Appointment in Berlin (also known as Assignment in Berlin) is a 1943 American war drama film directed by Alfred E. Green and starring George Sanders, Marguerite Chapman and Onslow Stevens. The film's plot follows an R.A.F. officer who infiltrates himself into the German high command by broadcasting a series of pro-Nazi messages.
Premise.
After being discharged from the British Army for anti-British activities, a soldier becomes a secret agent for Britain's Secret Service. He denounces his country and poses as a radio personality for Nazi Germany.
Production.
The film's art direction was by Lionel Banks and Walter Holscher.