So apparently the actual heroes of the Telemark really didn’t like that film, primarily because it was too noisy, with shooting and explosions etc, whereas they operated much more stealthily. The saboteurs actually starred in their own film Kampen om tungtvannet, a joint French and Norwegian production from 1948. The whole thing is on Youtube with reasonable English subtitles. It goes without saying that these guys were utter utter heroes - amazing bravery.
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