Lisa's Date with Density a child from Josh Weinstein's school days who everyday would get onto the bus with a piece of toast, which had Vaseline on it. A majority of the story is a reference to the film "Rebel Without a Cause". Lisa remarks that Nelson is "like a riddle wrapped in an enigma wrapped in a vest", a reference to "a riddle wrapped in a mystery inside an enigma"; this was Winston Churchill's opinion of Russia at the outbreak of the World War II. In its original broadcast, "Lisa's Date with Density" finished 63rd in ratings for the week of December 9–15,
Cryptanalysis of the Enigma in Hut 3, wrote of the Polish contribution: On 17 September 1939, the day the Soviet Union began its invasion of Poland, Cipher Bureau personnel crossed their country's southeastern border into Romania. They eventually made their way to France, and on 20 October 1939, at "PC Bruno" outside Paris, the Polish cryptanalists resumed work on German Enigma ciphers in collaboration with Bletchley Park. "PC Bruno" and Bletchley Park worked together closely, communicating via a telegraph line secured by the use of Enigma doubles. In January 1940 Alan Turing spent several days at "PC Bruno" conferring with his Polish colleagues. He