Peter Finch character Umberto Nobile
Sean Connery character Roald Amundsen
Claudia Cardinale character Valeria
Hardy Krüger character Einar Lundborg
Eduard Martsevich character Finn Malmgren
Grigori Gaj character Rudolf Samoylovich
Nikita Mikhalkov character Boris Chukhnovskiy
Luigi Vannucchi character Captain Zappi
Mario Adorf character Giuseppe Biagi
Donatas Banionis character Adalberto Mariano
Massimo Girotti character Giuseppe Romagna Manoja
Yuriy Solomin character Felice Trojani
Otar Koberidze character Natale Cecioni
Boris Khmelnitsky character Alfredo Viglieri
Yuri Vizbor character Frantisek Behounek
Nikolay Ivanov character Kolka Shmidt
Vladimir Smirnov character Shelagin
Tengiz Archvadze character Renato Alessandrini (uncredited)
Rein Aren character Karl Eggi (uncredited)
Heinz Braun character Reporter (uncredited)
Anatoliy Bystrov character Rinborg's Neighbor in the Hospital Room (uncredited)
Robert Daglish character The Reporter (uncredited)
Feliksas Einas character Amundsen's Servant (uncredited)
Roland Engmann character Duty Officer (uncredited)
Boris Goldayev character Kolka Shmidt's Fellow Villager (uncredited)
Leonid Kanevskiy character Italian Radio Operator (uncredited)
Viktor Kharitonov character Part-bit (uncredited)
Stanislav Khitrov character Radio Operator of Icebreaker 'Krasin' (uncredited)
Irakli Khizanishvili character Pomella (uncredited)
Eve Kivi character The Blonde Lady (uncredited)
Boris Klyuev character The Reporter (uncredited)
Stepan Krylov character The Boatswain (uncredited)
Sergey Madyanov character Part-bit (uncredited)
Vitaliy Matveev character Seeing Off (uncredited)
Galina Mikeladze character Telegraph Operator (uncredited)
Dmitriy Mirgorodskiy character Caratti (uncredited)
Oleg Mokshantsev character Pavel Ponomaryov (uncredited)
Yuriy Nazarov character Anatoliy Alekseev (uncredited)
Bruno O'Ya character Norwegian Radio Operator (uncredited)
Yevgeniy Orlov character Mishka (uncredited)
Gleb Plaksin character The Reporter (uncredited)
Ernst Romanov character The Polar Explorer (uncredited)
Paul Scofield character Main Judge (uncredited)
Aleksey Sezeman character The Reporter (uncredited)
Valeriy Sirovskiy character Lago (uncredited)
Nikolay Smorchkov character The Seaman (uncredited)
Rogvold Sukhoverko character Ringborg (uncredited)
Tamara Timofeeva character The Woman in the Crowd of People Seeing Off (uncredited)
Andrei Vertogradov character Radio Operator of 'Citta di Milano' (uncredited)
Luidmila Tsvetkova character Part-bit (uncredited)
Aleksandr Yanvaryov character Straube (uncredited)
Aleksandra Yozhkina character The Woman in the Crowd of People Seeing Off (uncredited)
