Fact-based story of Gen. Umberto Nobile (Peter Finch) and his ill-fated Arctic expedition. Amundsen: Sean Connery. Valeria: Claudia Cardinale. Lundborg: Hardy Kruger. Romagna: Massimo Girotti. Radio Operator: Mario Adorf. Location scenes shot in Estonia, Greenland, and the Soviet Union. Mikhail Kalatozov directed.