Although Jeff is a sophomore in college with Kelly as a junior in high school, there is a real-life six-year age difference between the two actors.
While Tiffani Thiessen (Kelly Kawpowski) later played Valerie Malone on Beverly Hills, 90210, Patrick Muldoon (Jeffery Hunter) later played Richard Hart in the spin-off Melrose Place. Both their characters were villains.
At the end of this episode, when Kelly asks Zack "Can we still be friends?," he replies "Forever." At the end of the Season 1 episode, The Election (1989), Zack will pretty much ask Jessie the same question and she would give the same answer. In the Season 3 episode, Rockumentary (1991), the gang, minus Jessie, will sing as a musical group the song "Friends Forever."