In the wake of the carjacking, Dylan becomes obsessed with self-defense. He frightens Kelly by constantly going to the shooting range. Jim and Cindy believe that Brenda and Stuart are spending too much time together. Mr. and Mrs. Carson wholeheartedly approve of the relationship. They invite the Walshes to their mansion for brunch. Brandon's sociology professor is impressed by his work and asks him to tutor a basketball star. Jackie is furious when Mel brings his girlfriend along on his weekend with Erin. Kelly and David take sides in their parents' dispute. Dan is afraid to see Andrea in public because he fears his colleagues' reaction. Andrea finally takes the initiative and kisses him in the middle of the student union.

Music: ""You Can't Hurry Love"" by the Supremes

The Walshes plan to spend the holidays in Hawaii, but their plane experiences mechanical problems. They are forced to fly back to Los Angeles and make an emergency landing. Dylan receives a surprise visit from Suzanne Steele, his father's former lover, and her 12-year-old daughter. The duo recently lost its home in Iowa to a flood, and decided to take a road trip as a distraction. Suzanne reveals that Erica is Dylan's half-sister. He is initially skeptical, but decides to give them the benefit of the doubt. Kelly boycotts Mel's Christmas party, but he comes through for her when she has a dental emergency. David gives Donna the cold shoulder for refusing to sleep with him. He breaks up with her on Christmas Eve.

Music: ""This Christmas""; ""The Christmas Song"" by Aaron Neville; ""Jingle Bells""; ""Silver Bells""; ""Angels We Have Heard on High,"" performed by church choir; ""Jingle Bell Rock""; ""Santa