Season 18
Episodes
1. The Friend Who Wasn't There
After she hears D.W. talking to her imaginary friend, Muffy tries to find her own.
2. Surprise!
When she is un-invited to Catherine's sixteenth birthday party, Francine tries to to make it the worst party ever.
3. The Case of the Girl With the Long Face
George is concerned about Fern when she falls into a state of sadness, but doesn't know why. Wanting to get to the bottom of the mystery, he enlists Buster Baxter to investigate.
4. The Substitute Arthur
Buster has to find someone else to hang out with while Arthur is on a weekend trip.
5. The Tattletale Frog
Bud Compson continuously wins against D.W., so she suggests a game called Throw the Hat, in which she accidentally breaks Dad's Froggy.
6. D.W. & Bud's Higher Purpose
When D.W. and Bud are too short to go on a roller coaster, they try to trick the ticket taker into letting them get on.
7. Best Wishes
After wishes for snow and cupcakes come true, Buster, Francine, and Binky are convinced that George has Wish Mojo, and put him under incredible pressure to use his new Wish Mojo to wish for even more snow.
8. The Tardy Tumbler
9. Fountain Abbey
Muffy is sad to discover that one of her ancestors worked as a maid for one of Binky's ancestors - a lord. Upon further investigation, Muffy finds out how that maid got promoted to a business manager.
10. Arthur Calls It
Arthur is umpiring a baseball game against Mighty Mountain and he has to decide whether Buster properly scored a home run.
11. Two Minutes
Timmy is outraged when he discovers Tommy was born two minutes before he was, leading to Tommy acting like a superior to Timmy.
12. Messy Dress Mess
Ladonna is cast an important role in an upcoming school musical, and Muffy lends her a dress for the rehearsal.
13. Whip. Mix. Blend.
When Rattles and his mother are invited to stay at her boyfriend's house for a weekend, Rattles must learn to get along with his two kids.
14. Staycation
D.W camps out in the backyard and learns that doing such a thing can be an adventure in its own right.
15. Shelter from the Storm
A powerful hurricane hits Elwood City. Ladonna's dad is called up by the Army Corps of Engineers. Muffy relocates to a shelter, while Arthur struggles to reunite lost pets and owners. And Brain seeks the help of a therapist to help him manage his anxiety.
16. Arthur Read, Super Saver
After hearing a slideshow on the Great Depression, Arthur begins to worry about the amount of money his family seems to be wasting through usage of water, electricity and lawn mowers.
17. Tibbles to the Rescue
D.W saves Tommy and Timmy from a fall, and they decide to repay her, much to D.W's annoyance.
18. The Pageant Pickle
Arthur is embarrassed about having to go see D.W's spring pageant, which he believes to be a waste of time.
19. Some Assembly Required
D.W is waiting for her new playground to be built, and all she has to play with is the box that it came in.