Trivia: The Day of the Jackal
- Fake Nationality: Most of the major French characters are played by English actors, though Michael Lonsdale, Delphine Seyrig and Olga Georges-Picot are exceptions.
- Hey, It's That Guy!: Apparently, seven centuries on, Cadfael is alive and well and working in France. Also, Michael Lonsdale, the actor who plays Lebel plays the villain Hugo Drax in the James Bond film Moonraker. Col. Mathieu will join the OAS apparently.
- Life Imitates Art: Infamous terrorist and assassin Ilich "Carlos" Ramírez Sánchez was given the nickname "The Jackal" after a Guardian correspondent saw a copy of this book among his possessions.