When Arthur finds Sue Ellen's lost diary at the library, he wonders whether or not to read it before he returns it to her.

After Fern and Sue Ellen take a popularity test in a magazine for teenage girls, the two start changing, leaving their friends longing for the old Fern and Sue Ellen to return.

Best friends Arthur and Francine begin to have doubts about their relationship when their classmates accuse them of being in love with one another.

Buster tries to convince Arthur, the Brain, and his other friends that he not only saw a UFO but also a comet heading for the earth.

When Buster rescues a cat stuck in a tree he is treated like a hero, but when he begins to enjoy his celebrity a little too much, his friends devise a plan to bring him back to his old self.

Arthur and his classmates are extremely nervous about an upcoming mathematics competition.

After watching the other animals make Mother's Day gifts, Violet the snake tries hard to think of something nice that she can make for her mother.