In the Italian version, the sequence where the Italian Officer Tonnelli meets Strasser is cut.
At the time of release, the film was banned in Germany because the story was considered to be anti-Nazi propaganda by the wartime censors. After the end of World War II, the picture was finally released in Germany but with around 20 minutes of footage cut (all scenes with Major Strasser and all references to Nazism). Other scenes were dubbed so that they had a totally different meaning (Victor Laszlo became Victor Larsen, an atomic physicist). In the 70s the film was redubbed by the ZDF, this time in its uncut form.
A colorized version was shown on Australian TV and was released on VHS in the United States.