The film's production started 20 years prior to Rex Reason being cast in the lead role; he replaced the earlier actor who had died, because his appearance was very similar to the older man's.
[Foreword] The outdoor scenes of this picture were filmed in the Karakoram Region of the Himalayas at altitudes ranging up to 24,000 feet when these mountains were explored for the first time by the International Himalaya Expedition under the leadership of Prof. G.O. Dyhrenfurth of Switzerland. The ritual dances were photographed at the Buddhist monastery of Lamayuru.
Final film of Jarmila Marton.