Spot is jealous of Leonard's daily journey to school, so he pretends to be a boy and goes to school

Leonard and Scott have to bring their pets to school, but Scott doesn't have a pet: he is a pet.

Scott is promoted to 5th grade and has to leave Leonard behind.

No one can figure out how Leonard knows what Leslie's lipstick tastes like. Spot knows.

Scott and Leonard go to their first sleep-over.

Scott falls in love with a circus dog.

The city wants to turn the dog park into a skateboard park and Scott can't decide which side he's on.

Principal Strickler's cat stays with the Leadreadys and disrupts Leonard and Scott's plans for laser tag and pizza.

A kindergartener has a crush on Leonard. Pretty Boy and Mr. Jolly complete to give up bad habits.

Pretty Boy is saddled with PMS-- Pre Migrational Syndrome-- a syndrome that only occurs in that time of the year, fall, when birds begin to feel like migrating down south for winter. Pretty Boy escapes the house, and begins migrating with another bird-- a cool cat with no name. So, while Leonard and Scott go out to look for Pretty Boy, Mr. Jolly vows he will never eat again until ""Pretty Boy is restored to his cage once more.""

Scott teaches Leonard how to play fetch-- or fetch-it, after Leonard says it's boring. That backfires the next day in school, when everyone is bored, trying to think of something to do. While Scott is off getting a drink of water, Leonard teaches everyone the game of Fetch-it-ball, which is just fetch, only with teams, and scoring. When Scott comes back from his drink of water and finds everyone playing fetch, he's surprised. When he finds out he didn't get any credit for fetch-it ... ball, he's even more surprised, and begins to get a little jealous. Later that day, while Scott tries to come up with a game to combat the ""grand game of fetch-it"", the fourth graders, led by Leonard, get pummeled by the fifth graders in fetch-it-ball.

Leonard bets his mom that Mr. Jolly can catch a mouse.

Leonard's granny visits but she's brought a live turkey that tries to befriend the pets.

A new girl comes to school and torments Spot.