* CaliforniaDoubling: The film was originally intended to be made in the UK, but UsefulNotes/WorldWarII made that idea all but impossible. So, it was filmed on the 20th Century Fox backlot. According to movie lore, the move to California meant that the movie would have to be filmed in black and white, rather than color as originally intended, because the colors of the flowers and other vegetation in California would not match the colors in Wales.
* PopCulturalOsmosisFailure: It's only known now as "the film that won [[UsefulNotes/AcademyAward Best Picture]] over ''Film/CitizenKane''."
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