Other mistake: Recreated newsreel of a trip to Japan by Moe Berg before Pearl Harbor attack shows copyright date of MCMXLIV (1944) in the lower left corner, 3 years after the attack. (00:16:25)
Other mistake: When Boyce and Ford are watching Chloe and the Nazi officer through the floorboards, the former are in the attic, the latter downstairs in the living room. Surely looking through the attic floorboards would only allow a view into one of the bedrooms. How then do Boyce and Ford manage to see down into the living room?