In this episode, Stephen Hawking claims that his IQ is 280. In reality, he was very modest about his intelligence. In an interview in 2004, when asked how high his IQ was, he replied "I have no idea. People who boast about their IQ are losers."
When Stephen Hawking died on March 14, 2018 this episode was re-broadcast with a "In Loving Memory" card with a still from this episode.
The street where the MENSA meetings are held - 13 Euclid Street - is named after Greek philosopher and mathematician Euclid.
The erotic photographer is modeled after famous Rolling Stone Magazine photographer Annie Leibovitz.
Lisa says that only one person in a million would find the C:/DOS T-shirt funny, which Professor Frink calls "The Dennis Miller" Ratio, making fun of the comedian's use of obscure facts and elaborate metaphors.