The film has a 67% rating in Rotten Tomatoes, based on six reviews, with an average rating of 6.10/10. Other versions Ray Mears made a documentary called The Real Heroes of Telemark. Despite mainly sticking to the factual evidence, some scenes in the documentary, like the film, were partly dramatised, focusing more on the survival skills involved in the operation. The same story was also covered in the 1948 Franco-Norwegian film Kampen om tungtvannet (La bataille de l'eau lourde — "The battle for heavy water"). Quite faithful to the real events, it even had many of the original Norwegian commandos starring as themselves. In 2015, the Norwegian Broadcasting Corporation showed a TV series called Kampen om tungtvannet (also known as The Heavy Water War or The Saboteurs) based on the events. See also Norwegian resistance movement Quisling regime List of World War II films References External links 1965 films 1965 war films British war films World War II films based on actual events Western Front of World War II films Films about Norwegian resistance movement Norwegian resistance movement Films directed by Anthony Mann Films about nuclear war and weapons Films scored by Malcolm Arnold 1960s English-language films 1960s British films