Jennifer Jones reportedly chewed garlic cloves before her love scenes with William Holden to deter her notoriously womanizing co-star.
Jennifer Jones, who was married at the time to studio mogul David O. Selznick, complained constantly during the filming of the movie, often yelling, "I'm going to tell David about this!" After complaining about William Holden, the two stars barely spoke to each other on the set. Finally, Holden tried to negotiate a peace, offering Jones a bouquet of white roses. She tossed them back into his face.
For his beach scene with Jennifer Jones, William Holden shaved the hair from his chest in order to get that "clean-cut" look supposedly favored by female moviegoers.
The aircraft that returns Mark to Hong Kong is Pan American World Airways N6535C, named "Clipper Mercury". It was a Douglas DC-6B, which entered service 1952 and left service 1961.