When the Read family car breaks down, Arthur is heartbroken. He wants to save the vehicle before his parents replace it.

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Mr. Ratburn assigns partners for a project and Arthur gets teamed up with Muffy. After spending a lot of time with her, he starts to act just like her.

After Arthur called Francine a marshmallow, Francine and her friends get really mad and it looks like they are going to fight. But when they both get locked inside the Elwood City Library they either have to make up, or prepare for a long and scary weekend, because it's the weekend and the library closes until Monday.

Arthur has a new puppy is exactly what he wanted. But the only problem is that he destroys everything in sight, so can Arthur teach Pal to behave, before his parents do something with Pal because of all the disasters he is causing.

Someone has been writing "Binky Rules" all over Lakewood Elementary and Mr. Morris thinks it is Binky. Binky says he didn't do it, so Fern and Buster are trying to find out.

Tired of playing with Muffy because she never played soccer, Francine starts to hang out with Jenna. So Muffy searches for a new friend.

D.W. obtains poison ivy while playing a game. Buster recaps his problem with asthma and how everyone was afraid of him being injured or getting themselves injured.

Arthur builds an ant farm for Mr. Rathburn's science class, but all the ants spill out and he must find a way to attract them back in.

Arthur does some heavy-duty studying, in order to compete in the school's upcoming spelling bee.

When the class goes on a field trip to a dinosaur museum, Buster finds a fossil on the ground - and wants to keep it for himself.

Buster's grades aren't as good as his jokes, and now he is on the verge of repeating his third grade year. If he does not receive at least a B on his next test, he fails...

Buster feels left out having missed all the adventures since he was away. He feels that everyone has changed and they feel the same about him, so Arthur plans a party so they can rekindle their friendship with Buster.

D.W. eats a big green potato chip and to get her off his back Arthur tells her that it's fatal and she could die. So D.W. spends this day as her last day until she finds out the truth.

D.W. and Tibbles help Arthur train for a 3K race against Brain.

Francine's convinced that she can fast on Yom Kippur just like her older sister. But then Arthur wins a free pizza party for all his friends for that very same day! Will Francine be able to resist?

Arthur and Buster fear that their new teacher, Mr. Ratburn, is some kind of evil maniac who collects children's heads - until they discover the truth about him, of course.

D.W. has an imaginary friend, Nadine, says she has to come everywhere, but Arthur is sick of it.

D.W. loves school and wants to go everyday, but when Ms. Morgan starts doing fire drills she fears for her safety and doesn't want to go anymore.

Mr. Ratburn assigns a project that involves family ancestors. Muffy and Francine turn this project into a competition to see who has the best ancestors.

Arthur is embarrassed because he now has to wear glasses.

Whew, boy is it HOT today. The Reads decide to head to the beach in order to cool off, but D.W. refuses to go along (she thinks there is an octopus in the water).

When Arthur desperately wants a dog, he starts a pet business. When he gets too many he decides to just take care of one pet.

Arthur's dream is to have Moon shoes, but he does not have the ten dollars to get them. When he begins working chores to receive money, he got too desperate and does something he will regret.

Viewers are taken back, as Arthur and D.W. recollect what happened when Baby Kate was first-born. D.W. is excited with anticipation, but Arthur is very worried. His worries are only made worse when his friends tell him about all the awful stuff that's going to happen when the baby comes. Still, Arthur, is determined to be a good big brother, but ends up thinking that the baby hates him!