Season 1 (Arthur's Adulthood)

1. New Beginnings (1 hour episode) - Arthur moves out of his parents home to live with all of his friends. Meanwhile, Jenna gets run over by a car for no reason. (Aired September 23, 2007)

2a. A Fun Day/2b. Road Racers - Arthur and his friends have a fun day out; Arthur joins a road race and becomes hospitalized. (Aired September 30, 2007)

3a. Dark Turn/3b. In Memory Of George - Binky kills George and the friends mourn over it; Arthur and the gang hold a funeral for George. (Aired October 7, 2007)

4a. Get a Job, Binky!/4b. Party-palozza - Arthur, Buster and Fern try to convince Binky to get a job to no avail; The gang holds a party and gets drunk. (Aired October 14, 2007)

5a. Memories from Lakewood/5b. A Big Duel - The gang remembers their Lakewood days 15 years ago; Muffy and Francine argue, which they act very childish and then make up months later. (Aired October 21, 2007)

6a. Roadtrip/Hall-O-Weener - The gang go on a roadtrip from Los Angeles to New York City, which Arthur is attacked by a group of stoners; Buster plays a Halloween prank on Arthur, involving weiners. (Aired October 28, 2007)

7a. Binky The Bully/7b. Bully Troubles - Binky is a bully and everyone is sick of that; Arthur is really having trouble finding peace between Binky and him, so he will try to plot revenge soon. (Aired November 4, 2007)

8a. Arthur's Revenge/8b. Dance Party - Arthur plots his revenge by killing Binky; Everyone is happy Arthur killed Binky so they all have a dance party. (Aired November 11, 2007)

9a. Sea Cruise/9b. The Trip - Sue Ellen takes the others on a sea cruise across the sea; Buster takes some hardcore drugs and has a really disturbing trip. (Aired November 18, 2007)

10a. Thanks for Giving/10b. Christmas - A Thanksgiving related episode; A Christmas related episode. (Thanks For Giving - Aired November 25, 2007/Christmas - December 23, 2007)

11a. Arthur's Nightmare/11b. Magic Ball - Arthur gets a nightmare, so the whole gang has to sleep with him (Buster and Fern in the bed with him, Francine on the floor and Muffy, The Brain and Sue Ellen on mattresses); The gang find a magical ball which can do anything, especially destroy a whole city. (Aired January 12, 2008)

12a. Crime Fighters/12b. Mystery of Shallow Bay - Buster and Fern become crime fighters that solve mysteries; Arthur goes to Shallow Bay, gets jumped and attacked and Fern does a mystery. (Aired January 19, 2008)

13a. Buster Beer/13b. Sick Day - Buster wants his own beer, since he loves beer and other alcohol and the others don't approve of it; Everyone gets sick, it's to the point where they are hospitalized. (Aired January 26, 2008)

14a. Valentine's Day Fever/14b. Never Say Never - Arthur gets sick on Valentine's Day and he is nursed back to health; A mean spirited episode between Francine and Arthur. (Aired February 16, 2008)

15a. March Rain/15b. Poison - It's raining in March, everyone loves it; Someone puts poison in Buster's beer as a prank but he doesn't fall for it. (Aired March 1, 2008)

16. Lakewood Reunion (1 hour episode) - Arthur and the gang are invited to a reunion at Lakewood Elementary (their old elementary school). (Aired March 8, 2008)

17a. The Best Night Ever/17b. Confidence is Key - Arthur and the gang have the best night of their lifes; Fern learns a life lesson. (Aired March 15, 2008)

18. Childhood Memories (1 hour episode) - Arthur remembers when he met everyone (March 22, 2008) Note: George and Binky are mentioned a lot in this episode

19a. Arthur's Birthday/19b. Words Can Hurt - Arthur gets his birthday ruined again because of his friends (like how they ruined his birthday when they were 8) aruging about gender, he gets PISSED and cusses them out, they apologize; Francine makes fun of everyone by saying harsh words. (Aired March 29, 2008)

20. Mr. Know- It-All - Brain gets killed by Francine because she is sick and tired of Brain being so smart. (Aired June 30, 2008)