A biohazard quarantine is placed on Louis' bedroom after he forgets about a plate of sushi. Donnie soon regrets inviting him to share his room. On school photo day, Ren gets her braces removed, but has a terrible reaction to medication and her campaign for reshoots goes nowhere until Louis gets involved.
Ren is a huge fan of newscaster Cynthia Mills while Louis and Twitty like weatherman Zippy Winds. To win a contest to meet their idols, the boys try to rig it but it involves Beans. Naturally, everything goes wrong. Can it be set right?
Ren and Bobby keep having very awkward moments getting to know each other; Louis keeps trying to help Twitty get his mojo back as the baseball team's star pitcher.
Donnie is the coach of Lawrence Jr. High's basketball team and asks Louis to be his assistant but after the team win their first match and prefer to party instead of practicing, he resigns.
Tawny sides with Tom when Louis and Twitty's behavior towards him causes fallout. Ren's relationship with Bobby goes nowhere because of interference from her dad and Mandy.
Eileen tries to present a model family as she runs for a new office, but Louis' crazy antics end up in the local news, then his science-fair project creates a disaster.
Louis befriends new student Lenny, whose size protects him during the start of dodgeball in gym class. Ren decides the game is barbaric and tries to get it banned until a stunt by Louis changes her mind.
At Halloween, something weird is going on at school: Principal Wexler and Coach Tugnut are turning all the students into mindless, respectful zombies, and only Louis can save them.
The Hawkins Day dance is coming up and Ren vows to make it cool. Louis is jealous of Twitty's potential dates, but then ruins his chances with Tawny by being overconfident that she will ask him.
Louis and Ren are out of control with their bickering so Donnie gets them on a TV show that will solve the problem. But Louis unexpectedly does a great kindness for Ren. Donnie wants to impress a French girl and needs Nelson to interpret which backfires.
Louis turns down his Dad's offer to whittle a wooden leprechaun together, suggesting Tom Gribalski as his substitute. When Dad and Tom start hanging out more and more, Louis regrets his decision.
Principal Wexler gives Ren a job with many responsibilities but the power goes to her head. The Stevens parents suggest Louis be given a position to combat his antics and he's made hall monitor. After installing surveillance cameras, Louis and Tom catch Ren breaking quite a number of rules.
Donnie is going to be inducted into the Wombat Hall of Fame and Louis pranks him because he's jealous. Injured Donnie is up for a scholarship and needs to seem healthy so Louis enlists Twitty in an elaborate scheme. Ren tangles with Beans over his stunts.
Ren organizes a charity mother-daughter bowling event but is embarrassed that her mother is bad at it. Louis hires a butler, Chives, to attend to his needs but he eventually feels guilty for his appalling behavior.
