The barricades used in this episode were actually real student submissions in an annual physics competition at Marist College in Poughkeepsie, New York.
Contrary to popular belief, the photo of Julian Ryman at the beginning of the episode is not that of Nobel Laureate Richard Feynman. It is in fact, a photo of actor Lawrence Dobkin, who plays Professor Ryman.
Ted Cole, who plays college student Geoffrey Kramer, was only sixteen years old when this episode originally aired.
The stone building in the opening scene is The Irving K. Barber Learning Centre, the main library at the University of British Columbia (UBC) in Vancouver, Canada.