On Secret Service (1936)

Greta Nissen stars as an Italian noblewoman living a dangerous double life as a spy A remake of the celebrated German thriller Spione am Werk Costarring noted German actor Karl Ludwig Diehl and American matinee idol Don Alvarado The film takes place in Vienna 1912 When an Austrian staff officer is implicated by association with a known Italian spy he goes on the run Three years later as the Great War gets into full swing he returns and begs the Austrian Secret Service to allow him to clear his name from suspicion