The gang attends a Halloween costume party at an old brownstone mansion with Steve playing Zorro, Donna dressed as a mermaid in which the costume limits her mobility, and Brenda and Dylan going as Bonnie and Clyde. But the party is highlighted by Kelly's very revealing bewitching costume, but low-lighted when one student makes an unwanted advance on her. Meanwhile, David skips out on the party to meet with Scott where they reminisce about the "good old days" while waiting for an egg fight with some neighborhood kids that never materializes. Also, Brandon and Emily take her twin niece and nephew out trick-or-treating where a real scare begins when they lose the twins.

In the two-part season finale, Brandon goes to Washington D.C. as a part of the college task force to meet the president. Kelly follows Brandon to Washington to get him out of a jam when Clare and Lucinda arrive at the hotel to pursue him. At the CU Mardi Gras, David impresses pop star Kenneth "Babyface" Edmunds, and his recording manager Ariel with his keyboard music and Donna catches David in a very compromising position with Ariel. Steve runs into Celeste who's now with John Sears. Kevin and Suzanne get married in a semi-formal ceremony where he persuades Dylan to cut out any outside investment in their business offer. Jim becomes angry at Dylan for making such a rash move and Dylan fires Jim as his financial holder. Dylan then goes to a bank and gives Kevin full power-of-attorney control over his money, unaware that Kevin and Suzanne have had a hidden agenda for Dylan's inheritance all this time. After her major success in the CU play, Brenda gets a scholarship offer to study acting in London and she pays a visit to Dylan's place before leaving. Also, Andrea and Jesse experience the joys and fears of parenthood after their daughter is born.

Kelly's car did not actually break down...she received a call from Dylan to meet her at a diner because he was depressed and was thinking about taking drugs again. Kelly went to meet him, and parked on a side street. The attacker started to follow her. He then pushed her into an alley and assaulted her.

Kelly confides in Dylan about her incident and later Donna, while Kelly begins to withdraw into a reclusive state resulting from the traumatic experience. Meanwhile, Matt defends a drug dealer on a burglary charge (who coincidentally happens to be Kelly's rapist), while at the same time, Matt thinks Kelly's odd behavior points to her seeing Dylan again. Donna declines both to move in with Noah or travel with Wayne for his Volleyball tournament. An art critic lauds Steve's photography for the Beverly Beat, prompting him to take more photographs of events. Also, Gina returns to ice skating while David decides to pursue her. But Dylan's presence and the pressure on Gina to qualify for a spot on a skating team makes her bulimia worsen.

A paranoid Kelly begins carrying a gun that Dylan procured for her. Steve throws a wild party at the Peach Pit After Dark when the Beverly Beat receives resounding positive national reviews; Janet doubts her career with the paper. After collapsing right before an ice skating audition, Gina finally confides in David that she has a history with bulimia. Dylan's presence gets in the way. A confused Donna continues to juggle her time between Noah and Wayne until Noah breaks up with her. She sleeps with Wayne & Noah walks in on them the morning after. Dylan offers a $100,000 reward for information leading to the conviction of Kelly's rapist and begins his own search, which leads to dead ends. Meanwhile, Kelly's rapist, Joe Patch, returns with a new case for Matt - to sue the police for excessive violence against him during his arrest.

After Kelly kills her rapist, she is arrested by the police who, though they believe her self-defense story, they still want to prosecute her for possessing a stolen gun. Kelly refuses to reveal that Dylan gave her the gun. Meanwhile, David kicks Dylan out of his house after finding Gina and Dylan in bed. Donna throws Gina out of the beach house after hearing Gina bad-mouth Kelly to TV reporters. Gina moves into Dylan's hotel suite at the same hotel where he lived as a teenager. Noah refuses to associate with Donna or anyone near her, while Donna thinks that her involvement with Wayne was a mistake when all he wants to do is have fun as Kelly is going through hell. Steve is perplexed with Janet's behavior after she tells him she loves him and then later says she's not sure the relationship is working.

David's brash, new radio persona received flack from Donna and others, but also high ratings. Meanwhile, Matt and Kelly clash when he goes to court to try to overturn the death sentence for a convicted rapist-murderer, while Kelly also gets a visit from the parents of her rapist. Noah and Gina continue running their secret gentlemen's club in the After Dark, but the place attracts the wrong attention when the police raid it after several nuisance complaints, arresting both Noah and Donna. Gina slips away with David's father, Mel, who's also in attendance. Steve and Janet clash over their plans for Halloween as Steve wants to decorate the house and Janet wants to appear in a band that's playing at a 1980's Halloween party at the After Dark.