Peter Finch

Umberto Nobile

Sean Connery

Roald Amundsen

Claudia Cardinale

Valeria

Hardy Krüger

Einar Lundborg

Eduard Martsevich

Finn Malmgren

Grigori Gaj

Rudolf Samoylovich

Nikita Mikhalkov

Boris Chukhnovskiy

Luigi Vannucchi

Captain Zappi

Mario Adorf

Giuseppe Biagi

Donatas Banionis

Adalberto Mariano

Massimo Girotti

Giuseppe Romagna Manoja

Yuriy Solomin

Felice Trojani

Otar Koberidze

Natale Cecioni

Boris Khmelnitsky

Alfredo Viglieri

Yuri Vizbor

Frantisek Behounek

Nikolay Ivanov

Kolka Shmidt

Vladimir Smirnov

Shelagin

Tengiz Archvadze

Renato Alessandrini (uncredited)

Rein Aren

Karl Eggi (uncredited)

Anatoliy Bystrov

Rinborg's Neighbor in the Hospital Room (uncredited)

Robert Daglish

The Reporter (uncredited)

Boris Goldayev

Kolka Shmidt's Fellow Villager (uncredited)

Leonid Kanevsky

Italian Radio Operator (uncredited)

Viktor Kharitonov

Part-bit (uncredited)

Stanislav Khitrov

Radio Operator of Icebreaker 'Krasin' (uncredited)

Irakli Khizanishvili

Pomella (uncredited)

Eve Kivi

The Blonde Lady (uncredited)

Boris Klyuev

The Reporter (uncredited)

Stepan Krylov

The Boatswain (uncredited)

Vitaliy Matveyev

Seeing Off (uncredited)

Galina Mikeladze

Telegraph Operator (uncredited)

Dmitriy Mirgorodskiy

Caratti (uncredited)

Oleg Mokshantsev

Pavel Ponomaryov (uncredited)

Yuriy Nazarov

Anatoliy Alekseev (uncredited)

Bruno O'Ya

Norwegian Radio Operator (uncredited)

Ernst Romanov

The Polar Explorer (uncredited)

Paul Scofield

Main Judge (uncredited)

Nikolay Smorchkov

The Seaman (uncredited)

Rogvold Sukhoverko

Ringborg (uncredited)

Tamara Timofeeva

The Woman in the Crowd of People Seeing Off (uncredited)

Andrei Vertogradov

Radio Operator of 'Citta di Milano' (uncredited)

Aleksandr Yanvaryov

Straube (uncredited)