Elisabeth Bjørn Sundquist as the tour guide Leif Maria Annette Tanderø Berglyd [no] as Sigurd’s daughter Ragnhild Julian Rasmussen Podolski as Sigurd’s
Freshman: The Rjukan Heavy Water Raid 1942 (ISBN 9780718305710) and Jostein Berglyd's 2007 Operation Freshman: The Actions and the Aftermath (ISBN 9789197589598)
Justice, pp. 964–965 "The spying game". SAS Band of Brothers pp. 363–368 Berglyd, Jostein (2007), Operation Freshman: The Actions and the Aftermath, Solna: