2x16 - Maniac Mansion

Fred's friend Eddie from high school shows up at the mansion. He's an actor who has had problems with drinking in his past. After getting shot down for another big role, he decides to drink again. He then shows up at Tina's play drunk and completely embarrasses her. Fred tells Eddie about his problem, so he tries to go without drinking for a week. He succeeds, and decides to keep a smaller role in a movie. Fred decides to throw a party to celebrate. Later, Eddie receives a telegram saying that he lost the job. He then shows up at the party seemingly drunk, but is just acting. He then tells everyone that Fred made him realize he was an alcoholic, and he will remain sober from now on.