If a fan of Hogan's Heroes sees John Banner's name in the credits, who played the very large Sgt. Schultz on the popular 1960's sitcom, wait halfway and then look for one of the skinniest actors on board, and that's him: Playing the sophisticated, mustached traitor of a villainous couple, and looking extremely different.
Early in the film, Champ and Jimbo are shown reading a newspaper which describes the current news about the war. At Alcatraz, newspapers were not allowed. All news was announced to the convicts solely at the Warden's discretion. Major events like the attack on Pearl Harbor were announced, however convicts generally didn't get a daily update on the events of the war.