Season 5

Season 5 of Arthur premiered in the United States on September 25, 2000 on PBS starting with "Arthur and the Big Riddle" and ending on November 27, 2000 with "Muffy Gets Mature". The TV special "Arthur's Perfect Christmas" premiered alongside this season, with its debut on November 23, 2000.

This was the last season with Michael Yarmush as the voice of Arthur, due to his voice maturing shortly after Season 4 finished airing. Sound effects of Yarmush's yelps and screams from Season 1 were used for Arthur due to Yarmush's noticeably deeper voice in this season. It was also Steven Crowder's first season as Brain. 

"Arthur's New Friend" was released around this time, but is not considered part of the season.

This is also the last season to use the original color palettes on the characters.

Episodes

Screenshot	Title	Number	Episode	Original Airdate
	"Arthur and the Big Riddle"	76	1a	September 25, 2000
	Arthur goes on the game show, Riddle Quest, against a really smart contestant. In the final round, he must decide between winning and his friends. Alex Trebek guest stars as the host, Alex Lebeck.
	"Double Dare"	76	1b	September 25, 2000
	Arthur, Buster, Francine, and the Brain resent the large amount of homework they are assigned, which culminates in a large number of dares issued to skip school. However, the next morning, everyone agrees to call off the plot due to guilt (personified by a giant clam). Francine fails to receive the message and carries on with it.
	"Kids are from Earth, Parents are from Pluto"	77	2a	October 2, 2000
	Lakewood Elementary is having an open house and Arthur and his friends are embarrassed by how their parents will act judging from the previous year's open house. This prompts Sue Ellen to ask her parents to act more "normal".
	"Nerves of Steal"	77	2b	October 2, 2000
	Buster wants the new CyberToy, but they're too expensive, so while he's at the drugstore he slips one into Arthur's backpack without him noticing. He feels guilty later, so he and Arthur try to return it without getting into trouble.
	"It's a No-Brainer"	78	3a	October 9, 2000
	Buster beats the Brain at a class Mathathon, so the Brain gives up on his studies and Buster must represent the class. Buster realizes that he can't do so and comes up with several plans to turn the Brain back to the way he is.
	"The Shore Thing"	78	3b	October 9, 2000
	Arthur, Buster, Binky, Sue Ellen, and the Brain are excited that Arthur's dad is going to take them some place better than Aqualand. Although disappointed that they're brought to the beach, he tells them about Ocean Zone and leaves them to find it. They have fun at the beach and realize that it is Ocean Zone.
	"The World Record"	79	4a	October 16, 2000
	Arthur and his friends attempt to break a world record by making the world's largest pizza.
	"The Cave"	79	4b	October 16, 2000
	Mr. Ratburn's class takes a field trip to some caves in Palisades Park. Arthur is afraid of going into the caves, but inside, he's not the one that's spooked the most. He uses what his dad told him and gets everyone out of there calmly.
	"The Lousy Week"	80	5a	October 23, 2000
	When Muffy gets lice, she is nervous about how her friends will feel. However, it ends up spreading to everyone at school, forcing them to be checked everyday and instead of doing homework, are forced to stay up late and have their parents take nits out of their hair.
	"You Are Arthur"	80	5b	October 23, 2000
	Arthur is training for and running a 3k race. Everything is seen from his point-of-view the whole episode.
	"The Election"	81	6a	October 30, 2000
	Mr. Ratburn's class holds a class election. Muffy takes the candidacy for class president seriously and a competitive campaign against Arthur ensues. However, they both lose to Binky and learn about elections and campaigning in the process.
	"Francine Goes to War"	81	6b	October 30, 2000
	Being annoyed by her new neighbor, Francine tries to get her to move by setting traps to scare her. This doesn't work and she makes a new friend as she gets to know her.
	"Sleep No More"	82	7a	November 6, 2000
	Buster believes it's his destiny to go to Pizza Paula's Pizzaland and win the pizza-eating contest for free pizza for life. While he is there, he goes back to the hotel room to sleep early for the contest, except he can't fall asleep.
	"Pet Peeved"	82	7b	November 6, 2000
	Francine pays Binky to look after Nemo for the weekend, but he doesn't take a look at her written instructions. When Nemo acts strangely at the mention of her, Binky keeps him away from her, thinking she is a bad owner.
	"The Last of Mary Moo Cow"	83	8a	November 13, 2000
	When D.W.'s favorite show, Mary Moo Cow, is canceled, she starts a petition to try to get it back on the air and visits its set at the TV station.
	"Bitzi's Beau"	83	8b	November 13, 2000
	Buster's mom has a boyfriend and he is nervous to meet him. At first he thinks it's Mr. Ratburn but finds out it's not. When he eventually meets her boyfriend, Harry, he finds out he's not so bad.
	"Just Desserts"	84	9a	November 20, 2000
	Arthur has a stomachache after eating too many sweets and has dreams involving fairy tales made famous by the Brothers Grimm.
	"The Big Dig"	84	9b	November 20, 2000
	Arthur and D.W. don't want to spend time with Grandpa Dave because all he does is play checkers and sleep. He tells them about a buried family treasure, but they don't want to wait up for him so they take the map and look for it themselves.
	"Arthur's Family Feud"	85	10a	November 27, 2000
	After Mr. Read's soufflé is destroyed, Arthur and D.W. both explain their sides of the story and ultimately attempt to bake one to compensate for the one they destroyed.
	"Muffy Gets Mature"	85	10b	November 27, 2000
	Muffy hangs out with Francine's sister, Catherine, because Francine is not mature enough. Catherine's friends don't receive her well and ridicule her because she uses "Mature Miss" as her guide for acting mature.