Little Boy Lost (1953)
Little Boy Lost is a 1953 American drama film directed by George Seaton and starring Bing Crosby, Claude Dauphin, and Christian Fourcade. Based on the novel Little Boy Lost by Marghanita Laski, the film is about a war correspondent stationed in Paris during World War II and once married to a French girl who was murdered by the Nazis. Following the war, he returns to France trying to find his son, whom he lost during a bombing raid but has been told is living in an orphanage in Paris.
More at Wikipedia.