Glenn Ford and his son Peter Ford had a difficult relationship during the shooting of the film. His son later confessed that it was a bitter time for both of them. Ford had just gotten a difficult divorce and behaved in a strange way with his son: one day he was friendly and the other, nasty. Glenn Ford's son compared his father to Dr Jekyll and Mr Hyde.
Veteran stuntman David Sharpe, a B-western star during the 1940s, plays the soldier who gets an arrow in the back and falls through a window.
R.G. Armstrong was originally cast as Sheriff Kelso, but he had to drop out because of another commitment. Lon Chaney Jr. was signed to replace him, but wasn't in shape to play the role. Ultimately, Paul Fix played the small part (just one short scene).
Shooting of the film was very difficult because of the climate and also infected water. Besides, Lon Chaney Jr. arrived on the set totally drunk and was unable to perform his job. He quit soon after shooting began.