DESTINATION TOKYO ('43) became a helpful tool during WWII. It was so accurate at showing the technical details of a submarine that the U.S. Navy used the production as a training film. It was also the only serious war movie Cary Grant ever made. | Turner Classic Movies: TCM

#OTD in 1943, "Destination Tokyo" starring Cary Grant was screened for the media in the the torpedo room of a submarine. The film's technical advisor CDR Dudley "Mush" Morton would never see it. He was lost when the USS Wahoo was sunk near Japan before production was completed. | U.S. Naval Institute