Jane Greer was pregnant during the shoot, but didn't want anyone to know. Seeing her use her pills against morning sickness, co-star William Bendix asked what they were for. After she told him they were for combating "Montezuma's Revenge", he asked her for some. Later, he thanked her because he didn't get sick.
The shooting schedule had to be rearranged to accommodate Robert Mitchum's 43-day stay in prison for marijuana possession.
Jane Greer got the female lead because studio head Howard Hughes didn't want to risk using Jane Russell, RKO's biggest female star, in case the public turned against Robert Mitchum because of his jail sentence for smoking marijuana. Greer and Hughes previously had a relationship, which she broke off to get married. Out of spite, Hughes stopped giving her roles, but decided that, in this case, she was perfect for the seemingly thankless role.
Originally, Lizabeth Scott had agreed to play the female lead. However, she bowed out after Robert Mitchum was convicted for smoking marijuana, afraid it would hurt her career.
Reunites Robert Mitchum and Jane Greer from the great film noir, Out of the Past (1947), which was released two years prior.