The Battle of the Heavy Water

The Battle of the Heavy Water, originally released as Kampen om tungtvannet, is a 1948 Norwegian-French war docudrama directed by Jean Dréville and Titus Vibe-Müller. The film reconstructs the sabotage actions against the Norsk Hydro heavy water plant at Vemork during the Second World War, when Norwegian resistance fighters helped prevent Nazi Germany from securing heavy water for its nuclear programme. What makes the film especially unusual is that several of the real participants appear as themselves, giving it a semi-documentary character rather than the more conventional dramatic form later used in The Heroes of Telemark (1965). The film blends reconstruction, wartime history and national memory into one of the earliest major screen treatments of the Norwegian heavy water sabotage.

The film was shot on location in Norway, with Rjukan and the Vemork area in Telemark at the centre of its visual identity. That gives the film a direct connection to the real landscape of the sabotage: the steep valley above Rjukan, the industrial power-station environment at Vemork, the surrounding mountains and the harsh winter terrain crossed by the resistance fighters. The story’s geography is not decorative, but essential to the drama, because the difficulty of reaching the plant, moving through the mountains and operating in such exposed conditions was part of the real operation itself. By filming in the actual region connected to the wartime events, The Battle of the Heavy Water gains a sense of authenticity that later, more fictionalised versions of the story had to recreate through larger-scale production.