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,
Publius Enigma the record company rather than the band, and that the prize for solving the riddle would have been a "crop of trees planted in a clear cut area of forest or something to that effect". The comments made by Mason corroborate parts of a previous interview by Sean Heisler with Marc Brickman, Pink Floyd's lighting and production designer and the man apparently responsible for putting the "ENIGMA PUBLIUS" message in the lights at the New Jersey concert. Brickman later expressed regret regarding his comments: Author Douglas Adams, who was responsible for giving "The Division Bell" its title, was also questioned