The song "Istanbul (Not Constantinople)" that is playing is from 1953, and was not around in 1947 when the episode was set.
Jon Huertas as "Dempsey's Cuban" says in Spanish "Vera! ¿Que pasando?". This line doesn't have any sense in Spanish; if it were translated directly into English he would have said, "What happening?". The correct line should be "¿Que esta pasando?" or "¿Que esta ocurriendo?".