Umberto Nobile

Roald Amundsen

Valeria

Einar Lundborg

Finn Malmgren

Rudolf Samoylovich

Boris Chukhnovskiy

Captain Zappi

Giuseppe Biagi

Adalberto Mariano

Giuseppe Romagna Manoja

Felice Trojani

Natale Cecioni

Alfredo Viglieri

Frantisek Behounek

Kolka Shmidt

Shelagin

Renato Alessandrini (uncredited)

Karl Eggi (uncredited)

Reporter (uncredited)

Rinborg's Neighbor in the Hospital Room (uncredited)

The Reporter (uncredited)

Amundsen's Servant (uncredited)

Duty Officer (uncredited)

Kolka Shmidt's Fellow Villager (uncredited)

Italian Radio Operator (uncredited)

Part-bit (uncredited)

Radio Operator of Icebreaker 'Krasin' (uncredited)

Pomella (uncredited)

The Blonde Lady (uncredited)

The Reporter (uncredited)

The Boatswain (uncredited)

Seeing Off (uncredited)

Part-bit (uncredited)

Telegraph Operator (uncredited)

Caratti (uncredited)

Pavel Ponomaryov (uncredited)

Anatoliy Alekseev (uncredited)

Norwegian Radio Operator (uncredited)

Mishka (uncredited)

The Reporter (uncredited)

The Polar Explorer (uncredited)

Main Judge (uncredited)

The Reporter (uncredited)

Lago (uncredited)

The Seaman (uncredited)

Ringborg (uncredited)

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

Radio Operator of 'Citta di Milano' (uncredited)

Part-bit (uncredited)

Straube (uncredited)

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