Arthur, tired of being the only one in his class who still has all his baby teeth, waits impatiently for his loose tooth to fall out.

Arthur gets fired by his new piano teacher, Dr. Fugue, for neglecting to practice, and then must find a way to convince Dr. Fugue to give him a second chance.

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.

At Prunella's half-birthday party, her sister unveils a fortune-telling cootie catcher that seems to be able to predict the future.

Fern dares Arthur and his friends to enter the poetry writing contest at the local library, but writing poems turns out to be harder than they thought.

Arthur's first sleepover: What could top a sleepover in the backyard with Buster and the Brain? When rumors start that a spaceship has landed in the neighborhood the idea of camping under the stars takes on a whole new meaning. Arthur's sister D.W. is so sure that he will see an alien on his overnight that she gives him her camera. When they hear muffled footsteps approaching their tent and see strange flashes of light, it seems D.W. was right! Or...

Arthur's determination to prove he is responsible enough to have a puppy brings him a menagerie of animals to care for.

Fefa está segura de que Francisca no puede ser amable durante una semana entera, que apuesta su reloj "Princesa Preciosa". Muffy is so sure that Francine cannot be nice for an entire week that she bets her Princess Peach watch on it, and now it is up to Francine to keep her temper.

Join Arthur and his family and friends for eight stories about the joys and challenges of having a brother or sister. From D.W. copying her big brother's every move, to the Tibble twins discovering one of them is two whole minutes older, the program features loads of sibling fun.