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)

Heinz Braun

Reporter (uncredited)