About The Simpsons (1989) Season 3, Episode 18 : Separate Vocations

The results from their aptitude tests cause Bart and Lisa to make 180-degree turns in their behavior. Blackboard: 'I will not barf unless I'm sick'. Guest Stars: Maggie Roswell, Russi Taylor, Pamela Hayden, Tress MacNeille, Steve Allen, Marcia Wallace,