Still at the ski lodge, Tommy D has time on his hands after his accident, and he and Megan start to spend some together. They go out on a date, which makes Lindsay and Bobby none too happy. Rachel and Brian also get caught up in the feuding that follows. Screech is chosen by Ramon-Ramon to be his new model, but he doesn't realize that the famous skiwear designer intends to make a mockery of him.
Tommy enjoys his mechanic's job at Vince's garage and he's good at it. Vince offers him regular employment. When school starts preventing Tommy from working at the garage as much as he'd like, he drops out so he can work full-time. It's a decision he comes to regret.
Bayside's 40th birthday celebration is in full swing. Bobby is running for homecoming ""king"" against Rachel, who's running for queen. A millionaire alumnus, J. Walter McMillan, comes to tour the school. He plans to buy Bayside and tear it down for condo construction. The gang are all reassigned to different schools. Screech's work program will come to an end and Mr. Belding will be looking for a job. Screech and the kids resolve to stop McMillan. Screech disguises himself as attorneys for both sides and the gang chain themselves to lockers, but nothing works. The school is slated to be destroyed after the prom.
Screech forgets to mail in Mr. Belding's application to join a prestigious society of principals, so he enlists the help of James the actor to convince Mr. B that he's been accepted. Also, the gang tries to buy the one millionth burger served at the Max so they can win tickets to the MTV Music Awards.
The students are depressed about Bayside's closing and can't get very excited about the prom. Mr. McMillan shows up and says he now plans to tear down the school even before the prom is held. Desperate to stop him, Rachel is disguised as ""Nurse McGillicuddy"" and the kids fake an outbreak of ""Swiss measles,"" for which a phony quarantine is set up. The prom is back on. The gang finds out that Mr. McMillan was a lonely guy at Bayside, with only one friend, a girl named Sandy Bennett. They locate Ms. Bennett but she can't come to Bayside's 40th prom because of a previous engagement with her nephew. The prom has a 1959 theme. Former Bayside High students Lisa Turtle and A.C. Slater show up, then Zack Morris arrives with Ms. Bennett, who it turns out is his aunt. McMillan is reunited with his old friend and she convinces him to abandon his plans to tear down Bayside.
The homecoming prom is coming up and Kelly is nominated to be crowned home coming queen, but she refuses to go out in public after discovering that she has a pimple. Zach and Screech accidentally create a zit removal cream only to find out that it has some very unusual side effects.
Watch Now:AmazonDuring a project for TV ads, Screech comes up with a new flavor of sauce, but the gang might go out of business when Screech becomes the target of a snobbish girl.
Watch Now:AmazonZack learns that his new girlfriend is the homeless man's daughter. When she decides to get her dad a new coat and it turns up missing, her boss Mr. Mooney accuses her of stealing it.
Watch Now:AmazonThe gang wins a mystery weekend at a mansion where they are all part of a murder mystery. The trouble begins when the game goes awry and Zack is left as the prime suspect
Watch Now:AmazonWeasel finds out he has a rare misprinted version of a comic book that is very valuable. After he sells it, Scott tries to get it back so he can sell it himself, buy concert tickets, and take out a pretty new girl, Rachel.
Mr. Belding leads the kids on a school-sponsored skiing trip. When they get to the lodge, Brian is more interested in hitting the slopes than being with Rachel, and Lindsay meets a college guy she's attracted to. The girls are invited to a frat party, and they go. While there, Lindsay is offered a beer and ends up drinking too much. The boys come looking for the girls and Tommy D starts drinking also. He and a girl he met take off on a snowmobile.
Watch Now:AmazonRachel must get a ""B"" on a test or she can't go to the Bayside Ball with Brian. Brian sees a copy of the test and tells Rachel what she should study. She makes the ""B,"" but now she thinks she doesn't have to work hard for good grades. Also, Mr. B is doing a performance evaluation of Screech. Screech enlists the kids to help him look good, but his plans keep backfiring.
Maria is getting a car for her 16th birthday, but she's failing Driver's Education. She pleads with Screech to pass her, and he agrees against his better judgment. Meanwhile Ryan needs a car to compete with Tommy for Lindsay. He gets the idea of pooling money to buy one and he recruits Rachel, R.J. and various nerds, jocks and band members to join in with him. When he's still $600 short, he gets a rich kid named Arthur to go in on the deal by using Rachel as bait. Rachel can't stand Arthur and gets mad at the boys for using her. Later, Maria is out driving with her friends when she hits Mr. Belding's parked car. Ryan and the gang use their money to buy an identical car while Mr. B's is being fixed. But the other partners show up and demand to have their turn in the new car. When Mr. Belding shows up and sees all the students piled into what he thinks is his car, he demands to know what's going on. Maria and Screech both own up to their mistakes.
Watch Now:AmazonScreech must decide whether he can leave break his attachment to Bayside with all its memories and people he loves for a better paying job offered to him by Valley High's Mr. Huffington.
Zack seeks revenge after catching Jeff and Kelly so he decides to get even by making her jealous.
Watch Now:AmazonIt's student-teacher week. Belding and Zack switch places. Kelly is Slater's teacher, but Slater thinks she's being too overboard. When she gives a test, Zack faces a hard decision: to be their friend or their leader
A drug producer comes to Bayside to do an anti drug commercial and decides to use the gang. The gang feels betrayed when they learn that he also does drugs.
Watch Now:AmazonThe gang is all invited to Jessie's father's wedding. Jessie is excited about meeting her new mother, until she learns that her dad is marrying a younger woman.
It's senior cut day. Zack tries his best to go through the day without being caught by Belding. Jessie and a boy protest the use of plastic cups.
Watch Now:AmazonThe school holds a dance-date auction to pay for new cheerleading uniforms, where Zach, Slater and Screech are up for auction. Jessie is appalled at the whole idea. Lisa becomes an intellectual to impress a smart boy.
Watch Now:AmazonDuring class, Zack learns about subliminal advertising and realizes that it could be used to trick Kelly into going to the dance with him. However, Kelly catches on to his scheme and the girls decide to teach Zack a lesson, which leaves him humiliated.
Watch Now:AmazonZack sprains his knee before the big basketball game, and while in hospital learns that Lisa is a part-time candy-striper. However, he also learns that he will need surgery to repair his knee and worries that it may go wrong.
Watch Now:AmazonIt's graduation day, but Zack will not be able to join the gang when they get their diplomas. It seems that he is a credit short of graduating and the only way he can get it back is by doing the unbelievable- BALLET!
Watch Now:AmazonIf Zack can just get out of detention with Mr. Belding, he can win a trip to Hawaii. Instead the whole gang ends up in detention with him, trying to get him out.
Watch Now:AmazonIt's the annual Bayside vs Valley prank war. Meanwhile the girls try to come up with a new cheer in the annual cheerleader competition.
Watch Now:AmazonThe gang is in trouble. If they fail a test by an obnoxious teacher, they won't be able to go on a class field trip. On the day of the test. the teacher doesn't show, so Belding's brother Rod takes over.
Watch Now:AmazonIt's the annual ATV race. Zack and the gang are entering it. Zack feels inferior when Stacey's ex-boyfriend shows up at the beach resort.
Watch Now:AmazonZach tries to stop Jessie from postponing her dad's wedding. Meanwhile, Slater tries to accept the fact his new girlfriend is really royalty.
It's the annual chess competition between Valley and Bayside. Screech is the head champion but Valley decides to get some dirt on Screech.
Watch Now:AmazonA.C. and his father fight over where he should attend college and Zack tries to fix it. Jessie becomes a cheerleader and worries about college acceptances.
Watch Now:AmazonZack convinces Belding to fire the nerds who own the student store. The gang reopens to store. Unfortunately no one wants to come in, so Zack and Screech secretly take pictures of the girl's swim team and a Kelly is invited to a model shoot out which leaves Zach out in the cold.
Watch Now:AmazonZack and Slater are both in driver's ed. Zack becomes green with envy when Slater does great, so he convinces Slater to drive the class's car. If Belding catches him, he fails, but the plan backfires.
Watch Now:AmazonKelly is in trouble. If she fails science she can't go to a concert. Screech agrees to tutor her and they become best friends but this doesn't impress rivals Zack and Slater.
Watch Now:AmazonSlater has to decide rather or not he and his dad are going to move to Hawaii or stay in Bayside. It is interesting that Slater's dad lets him decide this but seems unconcerned with Slater's thoughts on his future later on (wrestling scholarship or the army.) Zack at first tries his best to convince Slater to move away, so that Zack can get rid of his best rival for babes. Zack changes his mind though and Slater stays in Bayside.
Watch Now:AmazonEric learns that Zack and Slater paid Lisa off to go out with him in order to get him into trouble for driving Mr. Belding's car. To get back at them, Eric has the auto mechanic class take the totaled car apart. When Jessie finds out she confronts him about it, and soon gives him a black eye for calling her a "chick." To make amends, Eric puts Belding's car back together himself so Zack and Slater do not get into trouble, and apologizes.
What starts out as a class film, ends up as Screech posing as an alien for a tabloid when a reporter comes to investigate. But is the reporter as real as he claims to be.
Watch Now:AmazonZack falls for a college girl named Danielle when she goes to The Max to use the phone. In order to impress her, he lies about his age and makes fake I.D.'s so that that he, Slater and Screech can sneak into an over-18 nightclub. However, they get a big surprise when they see Kelly's boyfriend Jeff dancing with another girl there.
Watch Now:AmazonSlater feels inferior when he can't choose a career on career day. Zach wants to win a bet with a student at Bayside's rival school Valley, only to find out he's caught between a rock and a hard place when Slater quits wrestling.
Watch Now:AmazonZach, Slater and Screech are paired up with Kelly, Jessie and Lisa for a marriage project only to find out that it's not as easy as it seems.
Watch Now:AmazonIf Zack gets one more detention, he is suspended. Belding threatens to suspend Zack unless he agrees to go on a date with his niece Penny.
Watch Now:AmazonThe school song needs changing, and the gang decide to write a new song. But Zack gets all of them to compete against one another. Then they find out what's going on and gets him back by sabotaging his likely-to-win song.
Watch Now:AmazonScott signs up to get on the air at the school's radio station, hoping to attract the girls. But they all ignore him when they hear Weasel, who is giving advice on love and romance under the name ""Dr. Luv.""
To go on a ski trip, the gang conjures up a teacher's strike only to learn that it could affect the academic bowl.
Watch Now:AmazonFirst it's splitsville for Zack and Kelly when Kelly goes on a date with her ex-boyfriend. Then it happens to Jesse and Slater when Jesse wants to go to a ballet, but Slater wants to go see a football game.
Watch Now:AmazonThe gang all gets jobs at the Palisades mall during the holiday seasons. Zack befriends a girl who is working for Kelly. Zack and Screech make friends with a homeless man but when they visit him at the hospital they get a big surprise.
Watch Now:AmazonZack falls for a new student, only to discover that she's the new school nurse. Meanwhile Slater is afraid of getting his flu shots.
Watch Now:AmazonScott volunteers to babysit for Mr. Belding's son Zack. In order to impress a girl (Ashley), he offers up little Zack for a child modeling job.
Fed up with being laughed at by the football team, Weasel kicks the soccer net and gets a chance to be on the football team. Scott fixes Megan, Lindsay and Vicki's battle for a single varsity cheerleading spot.
Chad Westerfield, who has his eye on Megan, and Lindsay are leading candidates for Homecoming King and Queen.