Casey Kasem hosts a dance contest at The Max.

Lisa charges an exorbitant amount on her father's credit card and fears that he will never forgive her.

After Screech gets struck by lightning, he gains the ability to see into the future, and Zack uses him to cheat on a mid term exam.

In an attempt to find out who Kelly wants to take to a dance, Zack and Screech bug the girls' sleepover party and the girls get revenge.

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.

After the school's drama teacher falls ill, a handsome substitute arrives, and quickly captivates the girls, much to the chagrin of the boys.

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.

After discovering she is failing in science, Kelly is tutored by Screech, and soon develops a crush on him.

As part of an assignment for economics class, the gang forms a friendship bracelet company, but infighting soon leads to trouble and defection.

As part of a class project, Zack and Kelly, Slater and Jessie, and Screech and Lisa are paired up in mock marriages.

When Zack finds out that the elected student council president gets to leave school for a trip to Washington D.C., he runs against Jessie.

Zach uses subliminal messages on a music tape in order to get Kelly to ask him out to a dance.

The first day of school proves eventful for Zack, Slater, Screech, Kelly, Jessie, and Lisa.

When Bayside's rival school, Valley, revives the schools' ongoing prank war, the gang tries to get even.

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