Brenda, Dylan, Steve, Donna and Kelly attend a Halloween party. Donna dresses as a mermaid; but her fins inhibit dancing, walking, and trips to the bathroom. Kelly's seductive costume catches the eye of a college student. She goes upstairs to talk with him, then becomes uncomfortable. The guy accuses her of leading him on and tries to rape her. Brenda and Donna enter in the nick of time, and Steve punches out the guy. Brandon stays home to hand out candy (actually raisins), but Emily comes to the door with her niece and nephew. Brandon joins them for trick-or-treating, but he and Emily get caught up in their conversation and temporarily lose the kids. David blows off the party and finds Scott hiding out in the bushes. They reminisce about the old days while waiting for an egg fight that never materializes. Music: ""Romantic"" by Karyn White; ""Lily Was Here"" by Candy Dulfer and Dave Stewart; ""The Monster Mash"" by Bobby ""Boris"" Pickett (#1, 1962)