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Eric, Nicky, and Tony invest their class' trip money in to an unsuccessful stock market.

When Katie injures her arm during swim practice, she starts taking painkiller drugs which make matters worse.

Eric tricks the gang into making a music video about him.

Maria is neglected by her father.

Eric wants to become an honor cadet, but loses to a guy named Mark that Liz has a crush on. However, Eric soon learns that Liz changed Mark's answers on his test which made Mark the honor cadet in the first place.

Katie reads an unpleasant remark about her in Maria's journal, which eventually leads to a fight between her and Maria.

Katie, Nicky and Eric are talked into cheating.

Nicky becomes a hero when he saves a little kid from the movie theater during a violent earthquake.

During a party celebration, the gang drinks beer, which eventually leads to Liz getting sick and a near-break-up for Katie and Nicky.

The gang celebrates at the prom, which turns into tragedy when Tony and Maria break up, the prom music becomes a bubblegum Spanish version, and Mr. Belding gets drowsy after Screech gives him a powerful medicine. But all the problems get solved Also in the episode, after two seasons of going single and scouting out other dates while Tony and Maria and Katie and Nicky were in dating pairs, Liz and Eric date each other for the first time.

Mr. Belding gets offered a job at a college.

While the gang prepares for graduation, Katie and Nicky are forced to break up. As a gift for Mr. Belding for every senior to wear a '68 logo on their gowns honoring Mr. Belding's graduating class, Maria enlists Tony and Eric to pick up the graduation gowns but a little accident occurs when they spill ink all over them.

Wanting to get her car fixed, Maria gets ripped off by two sleazy car mechanics.