Season 12

Season 12 of Arthur premiered in the United States on October 6, 2008 on PBS with "Is That Kosher?" and ended on April 24, 2009 with "D.W.'s Furry Freakout".

The storyboard artists were asked to include a character riding a bicycle in each episode for this season.

Episodes

Screenshot	Title	Number	Episode	Original Airdate
	"Is That Kosher?"	146	1a	October 6, 2008
	Francine makes a bet with her sister, Catherine, that she can fast through Yom Kippur with their parents, but Arthur's pizza party is on the same day.
	"Never, Never, Never"	146	1b	October 6, 2008
	D.W. has too many toys in her room and her mom wants to send some to charity. She decides that she will give all of them to the people who love her most, forgetting that her mom said that she only needed to get rid of the ones she doesn't use. The Tibble Twins falsely say they love her more than ever, while Emily declines.
	"Room to Ride"	147	2a	October 13, 2008
	Binky watches a tape of Lance Armstrong, and decides to bike. Unfortunately, he hits a pothole and gets injured. He, Arthur, Buster, and the Brain start a campaign to put in more bike lanes for the city.
	"The Frensky Family Fiasco"	147	2b	October 13, 2008
	Francine realizes that her family isn't spending enough time together and makes every Tuesday family night.
	"D.W.'s Stray Netkitten"	148	3a	October 20, 2008
	D.W. asks Arthur and Emily to babysit her Netkitten since a "clown" virus hacked their computer.
	"Bats in the Belfry"	148	3b	October 20, 2008
	Arthur, D.W., and Buster turn Grandma Thora's attic into a clubhouse until Arthur spots a bat.
	"For the Birds"	149	4a	October 27, 2008
	The Brain eats breakfast when he hears talk on radio about sightings of a rare bird and he unsuccessfully attempts to spot it so he can win a prize after he signs up for a bird-watching club. He is angry when Buster talks about it at school and disguises as a monster so he can scare away the remaining club members.
	"Ungifted"	149	4b	October 27, 2008
	Buster builds an old model harvester (called the Grain Reaper) bought by his Uncle Stu after he stumbled upon it in his closet. He hands it over to Arthur, who trades it for Binky's Bionic Bunny poster, who then gives it to the Brain, who donates it to Lakewood Elementary, who then puts it in the school sale.
	"The Chronicles of Buster"	150	5a	November 3, 2008
	Buster watches a commercial for the 376-disc special edition DVD of The Chronicles of Ahmayzzia. One month later, he does bad and Arthur does good when they train for a rock-climbing expedition.
	"On This Spot"	150	5b	November 3, 2008
	After a lecture, Arthur prints out some images of the famous Native American Sitting Bull and a tree on the site where he performed in Buffalo Bill's Wild West Show. Arthur's friends are not interested, and Buster starts making a tour called the "Derek Montaigne Tour" after Arthur asks what historic events were done in Elwood City.
	"The Cherry Tree"	151	6a	April 20, 2009
	Muffy's insistence on having a huge Dream Bouncy Castle at her party results in her favorite cherry tree being cut down to make room for it.
	"Matchmaker, Match Breaker"	151	6b	April 20, 2009
	Francine and Muffy play matchmaker for their older siblings, Chip and Catherine, thinking if they marry they will become sisters.
	"War of the Worms"	152	7a	April 21, 2009
	Fern tricks the Brain into believing that Elwood City is under attack from giant worms, leaving unmistakable evidence, while eventually leading him into a rampage against worms.
	"I Owe You One"	152	7b	April 21, 2009
	Buster tries to repay all of the favors he owes Arthur by helping everyone whom Arthur owes favors to.
	"The Blackout"	153	8a	April 22, 2009
	Arthur and D.W. aren't sure they can survive without T.V. and A.C., when a blackout hits Elwood City on the hottest day of the year, until they learn about how the Molinas deal with the heat.
	"Mei Lin Takes a Stand"	153	8b	April 22, 2009
	Binky's adopted sister, Mei Lin, would rather crawl than walk until she hears a story from Pepe the flea (from "Flea To Be You and Me") and his brother, Sale.
	"Home Sweet Home"	154	9a	April 23, 2009
	Buster is fearful of attending summer camp, but discovers making new friends isn't as difficult as he thought.
	"Do You Believe in Magic?"	154	9b	April 23, 2009
	Arthur is jealous of Buster when his magic talents outshine his own.
	"The Perfect Game"	155	10a	April 24, 2009
	Francine is excited about designing a model city for class until she starts the project and obsesses on the baseball stadium for her favorite team, the Elwood City Grebes. Eventually she forgets about the whole project devoting everything to the stadium.
	"D.W.'s Furry Freak-out"	155	10b	April 24, 2009
	A cat finds its way to D.W., where she is accepted into her house. She causes much trouble with D.W. while they wait for her owner to claim her.

Trivia

• This is the first season animated by Animation Hong Kong Limited.
• This is the first season that Dallas Jokic, Lyle Lettau and Samantha Reynolds voiced Arthur, Brain and George, respectively.