Footage of the Murchison Falls in Africa, originally shot for Trader Horn, was used in the film.
The original director was James C. McKay, who filmed many gruesome scenes. In July 1936, he was replaced by John Farrow who practically re-shot the entire film. There were also cast and crew changes: Granville Bates was dropped from the cast, while Herbert Mundin was added, playing a new character. Darby Jones replaced Everett Brown as "Bomba"; Elmer Sheeley replaced Cedric Gibbons as art director; A. Arnold Gillespie replaced James Basevi for special effects; Tom Tutwiler replaced 'Max Fabian' for photographic effects; and Charles Salerno Jr. replaced cameramen Virgil W. Vogel and Walter Strenge.