Zack begins dating a college girl named Danielle, and asks Screech to make fake IDs in order that they can hang out with her at a club. However, things become complicated when the guys see Kelly's boyfriend, Jeff, there with another girl.
As graduation approaches, Zack learns that he is just one credit short of graduating. Desperate to get extra credit, he joins Bayside's ballet company, and when illness strikes some of the other cast members, he calls on the gang for help.
As part of Lisa's prize for winning a radio contest, the gang travel to a secluded mansion for a murder mystery weekend. However, things soon become sinister when it appears a real killer is on the loose.
While Zack's Mom prepares to put on the mall's production of A Christmas Carol, the gang try to help the Bentons get back on their feet for the holidays after Laura is accused of stealing.
While in the mall to buy tickets to a concert, the gang find a bag containing $5,000. They decide to use it to buy as many tickets as possible and scalp them, but it appears the two men the money belongs to will do anything to get it back.
Mr. Belding's brother Rod, a substitute teacher, arrives at Bayside to teach the gang's History class. Rod proves instantly popular, and soon Mr. Belding is dismayed to find that the kids prefer his brother to him.
Zack asks Kelly to be his date for the prom and she agrees, but when her father loses his job, she decides family is more important and gives up her chance to go, but cannot bring herself to tell Zack.
A famous film star comes to Bayside to shoot an anti-drug public service announcement. The gang are enchanted by him, but when they go to a party at his house, they discover he is a hypocrite.