A factual reconstruction of the sabotage which took place to prevent Germany from getting the heavy water needed to make an atomic bomb during World War II.

A reconstruction of the two last sabotage actions against the Norsk Hydro Heavy Water (Deuterium, D2O) plant at Vemork, Rjukan, in 1943-44. After the first two allied attempt of stopping the production by British soldiers and American bombings, allied trained young local patriots became successful saboteurs. First by undermining the factory, and later after a rebuild, the sinking of the heavily guarded ferry trying to transport the heavy water to Germany, on Lake Tinnsjo.—OJT

The film is a reconstruction of sabotage against the Norwegian Hydro's heavy water plant at Vemork Rukjan. After a British operation was unsuccessful, the Norwegians were put in to prevent Hitler from getting heavy water (and thus the atomic bomb). The action (28 February 1943) was successful, but the Allies wanted to make certain, with 150 American planes bombing the factory in November 1943, after which the Germans would move the factory and the remaining heavy water to Germany, but saboteurs and Norwegian home front commandos blew up on 20 February 1944 a ferry that carried heavy water railroad tank cars across Lake Tinn in Telemark.—HK Hanson

The factual reconstruction of events of the heavy water sabotage during World War II, with most of the saboteurs portraying themselves, with the outsmarting of the German guards as well as the placing of the bombs needed to change the feared conclusion of a German nuclear weapon. The last two of the four sabotage actions which prevented Germany in getting the heavy water needed to develop an atomic bomb in 1943-44. After an unsuccessful sabotage attempt by British soldiers and later American bombers to stop the heavy water production, young local patriots were trained in England to carry out the sabotage missions without killing a single person. It was considered one of the most heroic and epic sabotage actions which took place during the war. See many clips from "Kampen om Tungtvannet" in the documentary "Norwegian Resistance". Go to YouTube and search for "Norwegian Resistance" playlist, watching these three segments on the playlist. It's a must-see for anyone interested the heavy water sabotage. See and hear many of the people who were actually part of the missions. Finding "Kampen om Tungtvannet" in English is very difficult.