Question: What did Victor Beaumont play in the British 1965 Eastman Color war film directed by Anthony Mann based on the true story of the Norwegian heavy water sabotage during World War II?

Context articles: The Heavy Water War
Gunnar Syverstad
The Heroes of Telemark
Victor Beaumont
Fredrik Kayser
Knut Haukelid
Claus Helberg
Norwegian heavy water sabotage
Jomar Brun
Vemork

The Heavy Water War (original title Kampen om tungtvannet and alternative title The Saboteurs ) is a six-episode war drama TV miniseries produced by the Norwegian Broadcasting Corporation.
 It is a Norwegian/Danish/British co-production, directed by that tells about the German nuclear weapon project and the heavy water sabotage in Norway to disrupt it during the Second World War, with a particular emphasis on the role of Leif Tronstad.
Gunnar Bryde Syverstad, BEM (6 February 1910 – 11 March 1945) was a Norwegian resistance member.
 He is known for his assistance in the Norwegian heavy water sabotage.
The Heroes of Telemark is a British 1965 Eastman Color war film directed by Anthony Mann based on the true story of the Norwegian heavy water sabotage during World War II from "Skis Against the Atom," the memoirs of Norwegian resistance soldier Knut Haukelid.
 The film stars Kirk Douglas as Dr Rolf Pedersen and Richard Harris as Knut Straud, along with Ulla Jacobsson as Anna Pedersen.
 It was filmed on location in Norway.
As Peter Wolff, he appeared in a number of German films ("Revolt in the Reform School, Der brave Suender" etc.) and at least one play ("Die erste Mrs Selby").
 After emigrating to the United Kingdom in the 1930s, he appeared in British films and television dramas from the 1940s and Hollywood films from the 1960s.
 He is perhaps best known for his portrayals of Nazi German characters in films such as "Where Eagles Dare" (1968) in which he played Colonel Weissner, "Carve Her Name with Pride" (1958), "The Guns of Navarone" (1961) and "The Heroes of Telemark" (1965).
Fredrik Thorbjørn Kayser, {'1': ", '2': ", '3': ", '4': "} (25 May 1918 – 2 February 2009) was a Norwegian resistance member during World War II.
 He was especially noted for his role in the Norwegian heavy water sabotage, and has been referred to as "Western Norway's Gunnar Sønsteby".
Knut Haukelid{'1': ", '2': ", '3': ", '4': "} (born May 17, 1911, in Brooklyn, New York, United States; died March 8, 1994, in Oslo, Norway) was a Norwegian resistance movement soldier during World War II, most notable for participating in the Norwegian heavy water sabotage.
Claus Helberg (31 January 1919 – 6 March 2003) was a Norwegian resistance fighter and mountain guide.
 He was a member of Company Linge, a resistance commando unit that was best known for carrying out Norwegian heavy water sabotage during World War II.
 After the war, he worked for the Norwegian Mountain Touring Association until his retirement in 1982.
 While volunteering with the Association after his retirement, he helped guide several members of the Scandinavian royalty.
 According to the "New York Times", "[he was] the favorite mountain guide of Scandinavian royalty..." These clients included Queen Sonja and Queen Margrethe.
The Norwegian heavy water sabotage (Bokmål: "Tungtvannsaksjonen" , Nynorsk: "Tungtvassaksjonen" ) was a series of operations undertaken by Norwegian saboteurs during World War II to prevent the German nuclear weapon project from acquiring heavy water (deuterium oxide), which could have been used by the Germans to produce nuclear weapons.
 In 1934, at Vemork, Norway, Norsk Hydro built the first commercial plant capable of producing heavy water as a byproduct of fertilizer production.
 It had a capacity of 12 tonnes per year.
 During World War II, the Allies decided to remove the heavy water supply and destroy the heavy water plant in order to inhibit the German development of nuclear weapons.
 Raids were aimed at the 60 MW Vemork power station at the Rjukan waterfall in Telemark, Norway.
Jomar Brun MBE (18 June 1904 – 26 August 1993) was a Norwegian chemical engineer.
 He was born in Trondheim.
 He graduated from the Norwegian Institute of Technology in 1926, and worked for Norsk Hydro from 1929.
 He was central in the planning and running of the world's first industrial heavy water plant at Norsk Hydro Rjukan.
 During World War II he was called to London, and contributed to the planning phase of Operation Freshman and Operation Gunnerside, the heavy water sabotage at Vemork.
 He was decorated with the Order of the British Empire, and Officer of the French Legion of Honour.
 From 1951 he was appointed professor of electrochemistry at the Norwegian Institute of Technology in Trondheim.
Vemork is the name of a hydroelectric power plant outside Rjukan in Tinn, Norway.
 The plant was built by Norsk Hydro and opened in 1911, its main purpose being to fix nitrogen for the production of fertilizer.
 Vemork was later the site of the first plant in the world to mass-produce heavy water developing from the hydrogen production then used for the Haber process.
 During World War II, Vemork was the target of Norwegian heavy water sabotage operations.
 The heavy water plant was closed in 1971, and in 1988 the power station became the Norwegian Industrial Workers Museum.