Arnold finds out that several athletes at school are using anabolic steroids, so he goes undercover to expose the full story.
Arnold and Lisa get stuck working together on a school assignment, and get locked in their school's darkroom. This leads to the two of them coming to an understanding about their adversarial relationship.
Sam gets into a fight at Hamburger Hanger with a kid who constantly picks on him. Sam later discovers the bully is a foster child and is very jealous of what Sam has.
Arnold enlists a hustler to help him conceal a poor grade from Drummond, but the ruse becomes increasingly tricky to maintain.
Sam begins to hang out with Willis a lot more than with Arnold, making Arnold feel left out.
Arnold tells his friends that he has had sex with a girl, which leads to her deciding to have sex for real - which Arnold isn't ready for.
Arnold hopes to become a photojournalist and ends up getting a job at a newspaper, but he becomes disillusioned when he's asked to run errands instead of taking pictures.
Willis has a hard time adjusting to college, so he decides to drop out. However, he changes his mind when he finds out he's not the only one having trouble adjusting.
Conclusion. Sam manages to call home and tell Arnold where he is.
Arnold and Sam befriend a street performer, much to Mr. Drummond's chagrin. When they try to tell her they can't hang out with her anymore, she begins having an epileptic seizure.
Arnold is mugged on his way home from school, and is so traumatized that he begins carrying a knife. In order to get him to open up about the incident, Mr. Drummond arranges for a crime-prevention demonstration at school.
Mr. Drummond goes undercover at his company to find out how his employees really feel about working there.
Arnold enjoys going out with a classmate, but his friends think she isn't good enough for him and get him to dump her for a pretty cheerleader.
Arnold is pressured to drink by an alcoholic classmate. His parents find out and lay down the law, but when his friend is caught with some of Mr. Drummond's liquor, Arnold is accused of using it.
Sam has to have his tonsils removed but is afraid to go to the hospital. When Mr. Drummond has to undergo surgery himself, he and Sam try to face their fears together.
Arnold is forced to choose between his friend Robbie and a girl he likes when she is accuses Robbie of being a nerd, and Arnold has to judge the matter in student court.
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