Carroll Baker was very taken with co-star Robert Mitchum, but her plans to seduce him were thwarted when his old flame Shilrley MacLaine turned up on location.
The opening scene where the angry locals push Mister Moses was shot at Ruaka Trading Center, Nairobi. When he is subsequently "thrown" into the water, this is at Lake Naivasha around 45 miles away.
In 1962, UA wanted John Wayne to star.
The power station shown in the film is actually a diesel power station (Nairobi South) 'mocked' up to be a hydro station.