Spies at Work (German: Spione am Werk) is a 1933 German thriller film directed by Gerhard Lamprecht and starring Karl Ludwig Diehl, Brigitte Helm, and Eduard von Winterstein.

[1] A spy film, it is set during the First World War conflict between Austria and Italy.

The film's sets were designed by the art director Karl Weber and Erich Zander.

A British version On Secret Service was also made.

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