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,
Riddle Box albums called the six Joker's Cards. Each of the six Joker's Cards relate to a specific character — an entity of the Dark Carnival — that tries to "save the human soul" by showing the wicked inside of one's self. "Riddle Box" is one of several entities used to determine the fate of the dead. Upon death, a soul enters a dark chamber containing a jack-in-the-box on an old wooden table. The front of the box has a "painted question mark faded with time," representing the mystery of your own afterlife. As the handle is turned, a melodic tune begins