•
Bjørn Sundquist as Colonel
Birger Eriksen, Commandant of
Oscarsborg Fortress •
Terje Strømdahl as
Erik Solem, Chairman of the Military Commission of Inquiry of 1946 •
Jon Øigarden as Captain
Per Askim, the Norwegian Navy's representative in the Military Commission of Inquiry of 1946 •
Eldar Skar as Captain Magnus Sødem, Commander of the main battery •
Øystein Røger as Commander Senior Grade Andreas Anderssen, Acting Commander of the torpedo battery •
Håvard Bakke as Captain Thorleif Unneberg, Commander of the Intelligence and Signal Detachment •
Axel Bøyum as Sub-lieutenant Sigurd Bexrud, Torpedo Officer •
Fridtjov Såheim as Lieutenant August Bonsak, Sødem's second-in-command •
Elias Holmen Sørensen as Captain Vagn Jul Enger, Commander of the Kopås battery •
Odin Waage as Second lieutenant Bjarne Berntsen, Signal Officer •
Mads Ousdal as Major General
Jacob Hvinden Haug (voice), Commander of the
2nd Division and Commandant of
Akershus Fortress •
Andrea Berntzen as Borghild Eriksen, Colonel Eriksen's
Polio stricken daughter •
Jonas Hoff Oftebro as Second lieutenant Kristen Høie, Coastal Artillery Officer in charge of operating the
rangefinder at the main battery •
Kai Remlov as Rear Admiral Johannes Smith-Johannsen (voice), Commander of the 1st Naval District •
Robert Skjærstad as Major Hersleb Adler Enger (voice), Commander of Rauøy Fortress •
Jo Jørgen Stordal as Sergeant Ragnvald Rækken, Chief Gunner on Canon 1 ("Moses") •
Andreas Høvik as Sergeant Øivind Strøm, Chief Gunner on Canon 2 ("Aron") • Niels Halstensen Skåber as Private Egil Hansen, a non-combatant called in to man one of the canons • Valdemar Dørmænen Irgens as Private Knut Espeli, a
runner assigned to the Signal Detachment ==Production==