On the way to The Big O in London, England, the Mobile Unit van runs out of fuel.

Running on Empty

Arthur catches Buster sucking his thumb. / The gang invents their own kid-ruled utopia.

Arthur

Fern writes poems for greeting cards. / Is Prunella's locker really haunted?

Muffy helps Francine deal with the death of her Bubbe./Arthur makes his vacation more fun.

Arthur, D.W., and their friends have their first day of fourth grade and kindergarten.

D.W. meets Hana, who is much older and totally cool!/Buster thinks teachers have it easy.

Baby Kate has started talking! / Arthur forms a committee to boost school pride.

Grandma Thora shows D.W. how to be a great author. / Prunella has a birthday party.

Arthur breaks his mom's computer. / The kids remember when Muffy was the new kid.