When Lisa charges too much on her father's credit card, her friends help her cook up a scheme to sell her belongings so that she can pay back the bill.
In an attempt to cheer Screech up enough to complete their science project, Zack pretends to know a girl who is interested in Screech, but things soon become complicated.
When his father is offered a transfer to Hawaii, Slater must decide whether to move there or stay at Bayside, and Zack takes full advantage of the situation.
When Screech accidentally invents a seemingly miraculous zit cream, Zack sells it at school. However, it soon becomes clear that the cream has an alarming side effect.
During Career Week at school, Slater worries that continuing to focus on wrestling will not lead to a successful job. As a result, he quits the sport, worrying Zack, who has bet on Slater winning his next match.
Zack enlists Screech to tutor Kelly, when he finds out that she needs to pass an upcoming science test in order to go to a concert with him. When Screech and Kelly begin spending more time together than he'd expected, it makes him uncomfortable.
