Starting with this episode, the opening credits no longer feature Tommy Chong as Leo. The same opening sequence was used, but the scene of Leo and all the guys was replaced with the scene of Kitty, Donna and Jackie. This version of the opening sequence is the one that lasted the longest. It was used until the season 7 finale.
The episode title is also the title of a track on Led Zeppelin IV, released in 1971. In fact, all the season 5 titles are titles of Led Zeppelin songs.
Hyde says he read somewhere that by 1984, the government will be able to track people and use microchips to read our minds. This is a reference to the George Orwell novel "1984".
This is the first episode where Hyde (Danny Masterson) has a full beard.