S1·E11 B.Y.O.B.

Brenda goads Brandon into taking her to a party at Donna's house. He voices his objections to alcohol, but Steve spikes his drink. He decides to go along with it so that he won't appear ""uncool."" Kelly gets drunk and sleeps with Steve. Cindy catches Brenda with alcohol on her breath, but Brandon gets by unscathed. Jim and Cindy attend a weekend retreat, where they are forced to spend all their time with an overly friendly couple. Brenda convinces Brandon to throw a party, but they agree not to drink. Word of the party spreads, and it quickly gets out of hand. Brandon drinks heavily and kisses a stunned Andrea. Kelly dances with the lovestruck David to avoid Steve's advances. Brandon tries to drive to the store and smashes his car. He is arrested for drunk driving. Dylan takes him to an AA meeting and reveals that he is an alcoholic.