When Tiffani-Amber Thiessen (Kelly Kapowski) and Elizabeth Berkley (Jessica Spano) decided to leave Saved By The Bell halfway through the 4th Season, Senior Year, to pursue their careers, Saved By The Bell producer Peter Engel seems to have come up with several solutions. He appears to have decided to produce another partial season of Saved By The Bell proper in Grade 12 at Bayside, using a new female character in the place of Kelly and Jessie. This would allow them to finish the Grade 12 season of Saved By The Bell. This, in turn, would allow the producers to develop two new series for production: Saved by the Bell: The College Years, the continuation of the adventures of Zack Morris, Samuel "Screech" Powers, and A.C. Slater, and Saved by the Bell: The New Class, the continuation of the adventures of Mr. Richard Belding and the students of Bayside High School.
So, a new character was created for this "half" incarnation of "Saved by the Bell". The character's name was Tori Scott (Leanna Creel). This introduces another continuity question: it is still Grade 12 at Bayside, so where are Kelly and Jessie? It is obvious that the "Tori" Grade 12 episodes are supposed to take place in the same time-frame as the "Kelly and Jessie" Grade 12 episodes; we know this beacuse the "Tori" Grade 12 episodes were aired concurrently (i.e. on the very same days) that "Kelly & Jessie" Grade 12 episodes were in the '92-'93 Grade 12 season on NBC. So what's going on? The way to explain away this apparent discontinuity is to say that the "Tori" episodes are taking place at the same time as the "Kelly and Jessie" episodes, but that Kelly and Jessie are "off screen". Thus, Kelly and Jessie, and Tori, must be "in different classes", and we, the viewer, are seeing Tori on different days and different nights or in different locations than when or where we saw Kelly and Jessie in their Grade 12 episodes. So why are Kelly and Jessie almost never mentioned in Tori episodes, and vice versa? And why is Lisa's hair style different in some of the "Tori" episodes from the hair style she had through the entire "Kelly & Jessie" Grade 12 year? Well, you got me! and this explanation only goes so far.
Though filmed before the "Tori" episodes, the Grade 12 Graduation episode was shown after the Tori episodes (as apparently was the Hawaii TV movie), in primetime on NBC on May 22, 1993, along with the pilot to Saved by the Bell: The College Years (see below). It was rerun, again with Saved By The Bell: The College Years pilot, in the regular timeslot for the premiering Saved by the Bell-The College Years on Tuesday, September 7, 1993 at 8:00 pm EST.