Willems' (Trevor Howard's) seduction of Aissa (Kerima) involves a kiss that lasts one minute and fifty-two seconds. This was touted heavily in the movie's publicity.
Kerima met her second husband, Guy Hamilton, while working on this movie. He was the assistant director. They were married in 1964, the year Hamilton directed Goldfinger (1964), and the union lasted until his death in 2016.
Producer and Director Sir Carol Reed approached Graham Greene about adapting the Joseph Conrad novel. Greene, however, was in thrall of Conrad's work, and was too intimidated by the thought of turning it into a movie, so he declined the opportunity.
This movie was controversial in its day for its depiction of a biracial romance. American censors, in particular, had great difficulty with this aspect of the movie. Ironically, this turned out to be pure invention on the part of the filmmakers. Although Kerima, who plays Aissa, appears exotic, she is in reality French, and not part-Algerian as this movie's publicity would have had people believe.