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The working titles of this film were Tomorrow's Harvest and Give Us This Day. Hollywood Reporter news items reported the following production information: Irving Pichel was originally signed to direct, and Ingrid Bergman was initially sought for the female lead. Rick Vallin was also considered for a role. Maureen O'Hara was cast as "Clothilde," but in November 1943, withdrew due to pregnancy. In October 1943, Katina Paxinou was cast as "Mother Superior," but withdrew from the film two weeks later due to illness.