Alan Powers failed his first year at school. The result is declaring himself as The Brain, an overachiever. Many things he says and does is beyond the comprehension of most people. He works at an ice cream shop. He also has an intensive knowledge of psychology. One time he proved that his friends are camera shy. Another time D.W. teamed up with him to trick Arthur into taking her to a science museum.
Appearances
Arthur
Main cast, played by Steven Crowder
- Episode 5x01: Arthur and the Big Riddle (Sep 4, 2000)
- Episode 5x02: Double Dare (Sep 4, 2000)
- Episode 5x03: Kids are from Earth, Parents are from Pluto (Sep 11, 2000)
- Episode 5x04: Nerves of Steal (Sep 11, 2000)
- Episode 5x05: It's a No-Brainer (Sep 18, 2000)
- Episode 5x06: The Shore Thing (Sep 18, 2000)
- Episode 5x07: The World Record (Sep 25, 2000)
- Episode 5x08: The Cave (Sep 25, 2000)
- Episode 5x09: The Lousy Week (Oct 2, 2000)
- Episode 5x10: You are Arthur... (Oct 2, 2000)
- Episode 5x11: The Election (Oct 9, 2000)
- Episode 5x12: Francine Goes to War (Oct 9, 2000)
- Episode 5x13: Sleep No More (Oct 16, 2000)
- Episode 5x14: Pet Peeved (Oct 16, 2000)
- Episode 5x15: The Last of Mary Moo Cow (Oct 23, 2000)
- Episode 5x16: Bitzi's Beau (Oct 23, 2000)
- Episode 5x17: Just Desserts (Oct 30, 2000)
- Episode 5x18: The Big Dig (Oct 30, 2000)
- Episode 5x19: Arthur's Family Feud (Nov 6, 2000)
- Episode 5x20: Muffy Gets Mature (Nov 6, 2000)
- Episode 6x01: Sue Ellen Gets Her Goose Cooked (Sep 24, 2001)
- Episode 6x02: Best of the Nest (Sep 24, 2001)
- Episode 6x03: Arthur Plays the Blues (Oct 1, 2001)
- Episode 6x04: Buster's Sweet Success (Oct 1, 2001)
- Episode 6x05: Prunella's Special Edition (Oct 8, 2001)
- Episode 6x06: The Secret Life of Dogs and Babies (Oct 8, 2001)
- Episode 6x07: Muffy's Soccer Shocker (Oct 15, 2001)
- Episode 6x08: Brother Can You Spare a Clarinet? (Oct 15, 2001)
- Episode 6x09: The Boy Who Cried Comet! (Oct 22, 2001)
- Episode 6x10: Arthur and Los Vecinos (Oct 22, 2001)
- Episode 6x11: Citizen Frensky (Oct 29, 2001)
- Episode 6x12: D.W.'s Backpack Mishap (Oct 29, 2001)
- Episode 6x13: The Boy with His Head in the Clouds (Nov 5, 2001)
- Episode 6x14: More! (Nov 5, 2001)
- Episode 6x15: Rhyme for Your Life (Nov 12, 2001)
- Episode 6x16: For Whom the Bell Tolls (Nov 12, 2001)
- Episode 6x17: The Good Sport (Nov 19, 2001)
- Episode 6x18: Crushed (Nov 19, 2001)
- Episode 6x19: Arthur Loses His Marbles (Nov 26, 2001)
- Episode 6x20: Friday the 13th (Nov 26, 2001)
Main cast, played by Alex Hood
- Episode 7x01: Cast Away (Oct 8, 2002)
- Episode 7x02: The Great Sock Mystery (Oct 8, 2002)
- Episode 7x03: Francine's Split Decision (Oct 9, 2002)
- Episode 7x04: Muffy Goes Metropolitan (Oct 9, 2002)
- Episode 7x05: Ants in Arthur's Pants (Oct 10, 2002)
- Episode 7x06: Don't Ask Muffy (Oct 10, 2002)
- Episode 7x07: To Tibble the Truth (Oct 11, 2002)
- Episode 7x08: Waiting to Go (Oct 11, 2002)
- Episode 7x09: Elwood City Turns 100! (Oct 14, 2002)
- Episode 7x10: Prunella Sees the Light (Nov 28, 2002)
- Episode 7x11: Return of the Snowball (Nov 28, 2002)
- Episode 7x12: D.W.'s Time Trouble (Nov 26, 2002)
- Episode 7x13: Buster's Amish Mismatch (Nov 26, 2002)
- Episode 7x14: The World of Tomorrow (Nov 27, 2002)
- Episode 7x15: Is There a Doctor in the House? (Nov 27, 2002)
- Episode 7x16: Pick a Car, Any Car (Nov 25, 2002)
- Episode 7x17: Jenna's Bedtime Blues (Nov 25, 2002)
- Episode 7x18: April 9th (Nov 29, 2002)
- Episode 8x01: Dear Adil (Sep 15, 2003)
- Episode 8x02: Bitzi's Break-Up (Sep 15, 2003)
- Episode 8x03: Fernfern and the Secret of Moose Mountain (Sep 16, 2003)
- Episode 8x04: Thanks a Lot, Binky (Sep 16, 2003)
- Episode 8x05: Arthur's Snow Biz (Sep 17, 2003)
- Episode 8x06: Bugged (Sep 17, 2003)
- Episode 8x07: Fernkenstein's Monster (Sep 18, 2003)
- Episode 8x08: D.W., Dancing Queen (Sep 18, 2003)
- Episode 8x09: Vomitrocious! (Sep 19, 2003)
- Episode 8x10: Sue Ellen Chickens Out (Sep 19, 2003)
- Episode 8x11: Postcards from Buster! (Dec 22, 2003)
- Episode 8x12: Desk Wars (Dec 23, 2003)
- Episode 8x13: Desperately Seeking Stanley (Dec 23, 2003)
- Episode 8x14: Muffy's Art Attack (Dec 24, 2003)
- Episode 8x15: Tales from the Crib (Dec 24, 2003)
- Episode 8x16: Flea to Be You and Me (Dec 25, 2003)
- Episode 8x17: Kiss and Tell (Dec 25, 2003)
- Episode 8x18: Big Horns George (Dec 26, 2003)
- Episode 8x19: *Bleep* (Dec 26, 2003)
- Episode 9x01: Castle in the Sky (Dec 27, 2004)
- Episode 9x02: Tipping the Scales (Dec 27, 2004)
- Episode 9x03: Francine's Big Top Trouble (Dec 28, 2004)
- Episode 9x04: George Blows His Top (Dec 28, 2004)
- Episode 9x05: Arthur Weighs In (Dec 29, 2004)
- Episode 9x06: The Law of the Jungle Gym (Dec 29, 2004)
- Episode 9x07: Buster's Green Thumb (Dec 30, 2004)
- Episode 9x08: My Fair Tommy (Dec 30, 2004)
- Episode 9x09: Lights, Camera, Opera! (Dec 31, 2004)
- Episode 9x10: All Worked Up! (Dec 31, 2004)
- Episode 9x11: Arthur Makes Waves (Apr 4, 2005)
- Episode 9x12: It Came from Beyond (Apr 4, 2005)
- Episode 9x13: Three's a Crowd (Apr 5, 2005)
- Episode 9x14: A is for Angry (Apr 5, 2005)
- Episode 9x15: The A Team (Apr 6, 2005)
- Episode 9x16: Emily Swallows a Horse (Apr 6, 2005)
- Episode 9x17: D.W. Beats All (Apr 7, 2005)
- Episode 9x18: Buster the Myth Maker (Apr 7, 2005)
- Episode 9x19: Binky Goes Nuts (Apr 8, 2005)
- Episode 9x20: Breezy Listening Blues (Apr 8, 2005)
Main cast, played by Luke Reid
- Episode 1x01: Arthur's Eyes (Sep 2, 1996)
- Episode 1x02: Francine's Bad Hair Day (Sep 2, 1996)
- Episode 1x03: Arthur and the Real Mr. Ratburn (Sep 9, 1996)
- Episode 1x04: Arthur's Spelling Trubble (Sep 9, 1996)
- Episode 1x05: D.W. All Wet (Sep 16, 1996)
- Episode 1x06: Buster's Dino Dilemma (Sep 16, 1996)
- Episode 1x07: D.W.'s Imaginary Friend (Sep 23, 1996)
- Episode 1x08: Arthur's Lost Library Book (Sep 23, 1996)
- Episode 1x09: Arthur's Pet Business (Oct 7, 1996)
- Episode 1x10: D.W. the Copycat (Oct 7, 1996)
- Episode 1x11: Locked in the Library! (Oct 14, 1996)
- Episode 1x12: Arthur Accused! (Oct 14, 1996)
- Episode 1x13: Arthur Goes to Camp (Oct 21, 1996)
- Episode 1x14: Buster Makes the Grade (Oct 21, 1996)
- Episode 1x15: Arthur's New Puppy (Oct 28, 1996)
- Episode 1x16: Arthur Bounces Back (Oct 28, 1996)
- Episode 1x17: Arthur Babysits (Nov 4, 1996)
- Episode 1x18: Arthur's Cousin Catastrophe (Nov 4, 1996)
- Episode 1x19: Arthur's Birthday (Nov 11, 1996)
- Episode 1x20: Francine Frensky, Superstar (Nov 11, 1996)
- Episode 1x21: Arthur's Baby (Nov 18, 1996)
- Episode 1x22: D.W.'s Baby (Nov 18, 1996)
- Episode 1x23: Arthur Writes a Story (Nov 25, 1996)
- Episode 1x24: Arthur's Lost Dog (Nov 25, 1996)
- Episode 1x25: So Long, Spanky (Dec 2, 1996)
- Episode 1x26: Buster's New Friend (Dec 2, 1996)
- Episode 1x27: Arthur the Wrecker (Dec 9, 1996)
- Episode 1x28: Arthur and the True Francine (Dec 9, 1996)
- Episode 1x29: Arthur's Family Vacation (Dec 16, 1996)
- Episode 1x30: Grandpa Dave's Old Country Farm (Dec 16, 1996)
- Episode 1x31: Arthur and the Crunch Cereal Contest (Jan 6, 1997)
- Episode 1x32: D.W. Flips (Jan 6, 1997)
- Episode 1x33: Meek for a Week (Jan 13, 1997)
- Episode 1x34: Arthur, World's Greatest Gleeper (Jan 13, 1997)
- Episode 1x35: Arthur's Chicken Pox (Jan 20, 1997)
- Episode 1x36: Sick As a Dog (Jan 20, 1997)
- Episode 1x37: D.W. Rides Again (Jan 27, 1997)
- Episode 1x38: Arthur Makes the Team (Jan 27, 1997)
- Episode 1x39: Arthur's Almost Boring Day (Feb 3, 1997)
- Episode 1x40: The Half-Baked Sale (Feb 3, 1997)
- Episode 1x41: Sue Ellen Moves In (Feb 10, 1997)
- Episode 1x42: The Perfect Brother (Feb 10, 1997)
- Episode 1x43: D.W.'s Snow Mystery (Feb 17, 1997)
- Episode 1x44: Team Trouble (Feb 17, 1997)
- Episode 1x45: Bully for Binky (Feb 24, 1997)
- Episode 1x46: Mis-fortune Teller (Feb 24, 1997)
- Episode 1x47: Arthur's Tooth (Mar 3, 1997)
- Episode 1x48: D.W. Gets Lost (Mar 3, 1997)
- Episode 1x49: D.W. Thinks Big (Mar 10, 1997)
- Episode 1x50: Arthur Cleans Up (Mar 10, 1997)
- Episode 1x51: My Dad, the Garbage Man (Apr 21, 1997)
- Episode 1x52: Poor Muffy (Apr 21, 1997)
- Episode 1x53: D.W.'s Blankie (Apr 28, 1997)
- Episode 1x54: Arthur's Substitute Teacher Trouble (Apr 28, 1997)
- Episode 1x55: I'm a Poet (May 19, 1997)
- Episode 1x56: The Scare-Your-Pants-Off Club! (May 19, 1997)
- Episode 1x57: My Club Rules! (May 26, 1997)
- Episode 1x58: Stolen Bike (May 26, 1997)
- Episode 1x59: Arthur's First Sleepover (Jun 2, 1997)
- Episode 1x60: Arthur's New Years Eve (Jun 2, 1997)
- Episode 2x01: Arthur Meets Mr. Rogers (Sep 22, 1997)
- Episode 2x02: Draw! (Sep 22, 1997)
- Episode 2x03: Binky Barnes, Art Expert (Sep 29, 1997)
- Episode 2x04: Arthur's Lucky Pencil (Sep 29, 1997)
- Episode 2x05: D.W., the Picky Eater (Oct 6, 1997)
- Episode 2x06: Buster and the Daredevils (Oct 6, 1997)
- Episode 2x07: Arthur Makes a Movie (Oct 13, 1997)
- Episode 2x08: Go to Your Room, D.W. (Oct 13, 1997)
- Episode 2x09: Arthur's Underwear (Oct 20, 1997)
- Episode 2x10: Francine Frensky, Olympic Rider (Oct 20, 1997)
- Episode 2x11: Buster Baxter, Cat Saver (Oct 27, 1997)
- Episode 2x12: Play it Again, D.W. (Oct 27, 1997)
- Episode 2x13: Arthur's TV-Free Week (Nov 3, 1997)
- Episode 2x14: Night Fright (Nov 3, 1997)
- Episode 2x15: Arthur vs. the Piano (Nov 10, 1997)
- Episode 2x16: The Big Blow-Up (Nov 10, 1997)
- Episode 2x17: Lost! (Dec 8, 1997)
- Episode 2x18: The Short, Quick Summer (Dec 8, 1997)
- Episode 2x19: D.W. Goes to Washington (Dec 15, 1997)
- Episode 2x20: Arthur's Mystery Envelope (Dec 15, 1997)
- Episode 2x21: D.W.'s Deer Friend (Jan 19, 1998)
- Episode 2x22: Buster Hits the Books (Jan 19, 1998)
- Episode 2x23: Arthur's Faraway Friend (Jan 28, 1998)
- Episode 2x24: Arthur and the Square Dance (Jan 28, 1998)
- Episode 2x25: Water and the Brain (Feb 7, 1998)
- Episode 2x26: Arthur the Unfunny (Feb 7, 1998)
- Episode 2x27: Sue Ellen's Lost Diary (Feb 14, 1998)
- Episode 2x28: Arthur's Knee (Feb 14, 1998)
- Episode 2x29: Grandma Thora Appreciation Day (Mar 9, 1998)
- Episode 2x30: Fern's Slumber Party (Mar 9, 1998)
- Episode 2x31: Love Notes for Muffy (Mar 16, 1998)
- Episode 2x32: D.W. Blows the Whistle (Mar 16, 1998)
- Episode 2x33: Francine Redecorates (Mar 23, 1998)
- Episode 2x34: Arthur the Loser (Mar 23, 1998)
- Episode 2x35: Arthur vs. the Very Mean Crossing Guard (Apr 27, 1998)
- Episode 2x36: D.W.'s Very Bad Mood (Apr 27, 1998)
- Episode 2x37: D.W.'s Name Game (May 18, 1998)
- Episode 2x38: Finders Key-pers (May 18, 1998)
- Episode 2x39: How the Cookie Crumbles (May 25, 1998)
- Episode 2x40: Sue Ellen's Little Sister (May 25, 1998)
- Episode 3x01: Buster's Back (Sep 21, 1998)
- Episode 3x02: The Ballad of Buster Baxter (Sep 21, 1998)
- Episode 3x03: D.W., All Fired Up (Sep 28, 1998)
- Episode 3x04: I'd Rather Read It Myself (Sep 28, 1998)
- Episode 3x05: Arthur Goes Crosswire (Oct 5, 1998)
- Episode 3x06: Sue Ellen and the Brainasaurus (Oct 5, 1998)
- Episode 3x07: Background Blues (Oct 12, 1998)
- Episode 3x08: And Now Let's Talk to Some Kids (Oct 12, 1998)
- Episode 3x09: The Chips are Down (Nov 2, 1998)
- Episode 3x10: Revenge of the Chip (Nov 2, 1998)
- Episode 3x11: Binky Rules (Nov 9, 1998)
- Episode 3x12: Meet Binky (Nov 9, 1998)
- Episode 3x13: Arthur Rides the Bandwagon (Nov 16, 1998)
- Episode 3x14: Dad's Dessert Dilemma (Nov 16, 1998)
- Episode 3x15: Popular Girls (Dec 7, 1998)
- Episode 3x16: Buster's Growing Grudge (Dec 7, 1998)
- Episode 3x17: Arthur's Treasure Hunt (Jan 4, 1999)
- Episode 3x18: The Return of the King (Jan 4, 1999)
- Episode 3x19: Attack of the Turbo Tibbles (Jan 11, 1999)
- Episode 3x20: D.W. Tricks the Tooth Fairy (Jan 11, 1999)
- Episode 3x21: Double Tibble Trouble (Feb 8, 1999)
- Episode 3x22: Arthur's Almost Live Not Real Music Festival (Feb 8, 1999)
- Episode 3x23: What Scared Sue Ellen? (Mar 15, 1999)
- Episode 3x24: Clarissa is Cracked (Mar 15, 1999)
- Episode 3x25: Arthur's Dummy Disaster (Apr 26, 1999)
- Episode 3x26: Francine and the Feline (Apr 26, 1999)
- Episode 3x27: Mom and Dad Have a Great Big Fight (May 24, 1999)
- Episode 3x28: D.W.'s Perfect Wish (May 24, 1999)
- Episode 3x29: Arthur and D.W. Clean Up (May 31, 1999)
- Episode 3x30: The Long, Dull Winter (May 31, 1999)
- Episode 4x01: D.W.'s Library Card (Sep 6, 1999)
- Episode 4x02: Arthur's Big Hit (Sep 6, 1999)
- Episode 4x03: Hide and Snake (Sep 13, 1999)
- Episode 4x04: Muffy's New Best Friend (Sep 13, 1999)
- Episode 4x05: Buster's Breathless (Sep 20, 1999)
- Episode 4x06: The Fright Stuff (Sep 20, 1999)
- Episode 4x07: The Contest (Sep 27, 1999)
- Episode 4x08: Prove It (Sep 27, 1999)
- Episode 4x09: The Blizzard (Oct 4, 1999)
- Episode 4x10: The Rat Who Came to Dinner (Oct 4, 1999)
- Episode 4x11: D.W. Tale Spins (Oct 11, 1999)
- Episode 4x12: Prunella Gets It Twice (Oct 11, 1999)
- Episode 4x13: Binky Barnes, Wingman! (Oct 18, 1999)
- Episode 4x14: To Beat or Not to Beat (Oct 18, 1999)
- Episode 4x15: 1001 Dads (Oct 25, 1999)
- Episode 4x16: Prunella's Prediction (Oct 25, 1999)
- Episode 4x17: What is That Thing? (Nov 1, 1999)
- Episode 4x18: Buster's Best Behavior (Nov 1, 1999)
- Episode 4x19: My Music Rules (Nov 8, 1999)
- Episode 4x20: That's a Baby Show! (Nov 8, 1999)
Main cast, played by Paul-Stuart Brown
- Episode 10x01: Happy Anniversary (May 15, 2006)
- Episode 10x02: The Squirrels (May 16, 2006)
- Episode 10x03: Fern & Persimmony Glitchet (May 16, 2006)
- Episode 10x04: Desert Island Dish (May 17, 2006)
- Episode 10x05: The Secret About Secrets (May 17, 2006)
- Episode 10x06: Feeling Flush (May 18, 2006)
- Episode 10x07: Family Fortune (May 18, 2006)
- Episode 10x08: D.W. Aims High (May 19, 2006)
- Episode 10x09: Flaw and Order (May 19, 2006)
- Episode 10x10: The Curse of the Grebes (May 22, 2006)
- Episode 10x11: Arthur Changes Gears (May 22, 2006)
- Episode 10x12: Unfinished (May 23, 2006)
- Episode 10x13: D.W., Bossy Boots (May 23, 2006)
- Episode 10x14: Binky vs. Binky (May 24, 2006)
- Episode 10x15: Operation: D.W.! (May 24, 2006)
- Episode 10x16: Do You Speak George? (May 25, 2006)
- Episode 10x17: World Girls (May 25, 2006)
- Episode 10x18: What's Cooking? (May 26, 2006)
- Episode 10x19: Buster's Special Delivery (May 26, 2006)
- Episode 11x01: Swept Away (Jun 25, 2007)
- Episode 11x02: Germophobia (Jun 25, 2007)
- Episode 11x03: Arthur Sells Out (Jun 26, 2007)
- Episode 11x04: Mind Your Manners (Jun 26, 2007)
- Episode 11x05: Buenas Noches, Vicita (Jun 27, 2007)
- Episode 11x06: Prunella Packs It In (Jun 27, 2007)
- Episode 11x07: Phony Fern (Jun 28, 2007)
- Episode 11x08: Brain's Shocking Secret (Jun 28, 2007)
- Episode 11x09: Baby Kate and the Imaginary Mystery (Jun 29, 2007)
- Episode 11x10: Strangers on a Train (Jun 29, 2007)
- Episode 11x11: The Making of Arthur (Sep 3, 2007)
- Episode 11x12: Dancing Fools (Sep 3, 2007)
- Episode 11x13: Hic or Treat (Sep 4, 2007)
- Episode 11x14: Mr. Alwaysright (Sep 4, 2007)
- Episode 11x15: Francine's Pilfered Paper (Sep 5, 2007)
- Episode 11x16: Buster Gets Real (Sep 5, 2007)
- Episode 11x17: D.W. on Ice (Sep 6, 2007)
- Episode 11x18: Spoiled Rotten! (Sep 6, 2007)
- Episode 11x19: Big Brother Binky (Sep 7, 2007)
Main cast, played by Lyle Lettau
- Episode 12x01: Is That Kosher? (Oct 6, 2008)
- Episode 12x03: Room to Ride (Oct 13, 2008)
- Episode 12x05: D.W.'s Stray Netkitin (Oct 20, 2008)
- Episode 12x06: Bats in the Belfry (Oct 20, 2008)
- Episode 12x07: For the Birds (Oct 27, 2008)
- Episode 12x08: Ungifted (Oct 27, 2008)
- Episode 12x09: The Chronicles of Buster (Nov 3, 2008)
- Episode 12x10: On This Spot (Nov 3, 2008)
- Episode 12x11: The Cherry Tree (Apr 20, 2009)
- Episode 12x12: Matchmaker, Matchbreaker (Apr 20, 2009)
- Episode 12x13: War of the Worms (Apr 21, 2009)
- Episode 12x14: I Owe You One (Apr 21, 2009)
- Episode 12x15: The Blackout (Apr 22, 2009)
- Episode 12x16: Mei Lin Takes a Stand (Apr 22, 2009)
- Episode 12x17: Home Sweet Home (Apr 23, 2009)
- Episode 12x18: Do You Believe in Magic (Apr 23, 2009)
- Episode 12x19: The Perfect Game (Apr 24, 2009)
- Episode 12x20: D.W.'s Furry Freakout (Apr 24, 2009)
- Episode 13x01: No Acting Please (Oct 12, 2009)
- Episode 13x02: Prunella Deegan and the Disappointing Ending (Oct 12, 2009)
- Episode 13x03: The Silent Treatment (Oct 13, 2009)
- Episode 13x04: Kung Fool (Oct 13, 2009)
- Episode 13x05: Arthur's Number Nightmare (Oct 14, 2009)
- Episode 13x06: Brain Gets Hooked (Oct 14, 2009)
- Episode 13x07: MacFrensky (Oct 15, 2009)
- Episode 13x08: The Good, the Bad, and the Binky (Oct 15, 2009)
- Episode 13x09: The Great MacGrady (Oct 19, 2009)
- Episode 13x10: When Carl Met George (Apr 5, 2010)
- Episode 13x11: D.W. Swims with the Fishes (Apr 5, 2010)
- Episode 13x12: The Portrait of the Artist As a Young Tibble (Apr 6, 2010)
- Episode 13x13: The Secret Guardians (Apr 6, 2010)
- Episode 13x14: Fernlets by Fern (Apr 7, 2010)
- Episode 13x15: Prunella and the Haunted Locker (Apr 7, 2010)
- Episode 13x16: Paradise Lost (Apr 8, 2010)
- Episode 13x17: The Pride of Lakewood (Apr 8, 2010)
- Episode 13x18: Looking for Bonnie (Apr 9, 2010)
- Episode 13x19: The Secret Origin of Supernova (Apr 9, 2010)
- Episode 14x01: The Wheel Deal (Oct 11, 2010)
- Episode 14x02: The Buster Report (Oct 11, 2010)
- Episode 14x03: The Agent of Change (Oct 12, 2010)
- Episode 14x04: D.W. Unties the Knot (Oct 12, 2010)
- Episode 14x05: Nicked by a Name (Oct 13, 2010)
- Episode 14x06: The Play's the Thing (Oct 13, 2010)
- Episode 14x07: Falafelosophy (Oct 25, 2010)
- Episode 14x08: The Great Lint Rush (Oct 25, 2010)
- Episode 14x09: Tales of Grotesquely Grim Bunny (Oct 29, 2010)
- Episode 14x10: Pet Projects (Oct 29, 2010)
- Episode 14x11: Follow the Bouncing Ball (Apr 22, 2011)
- Episode 14x12: Buster Baxter & the Letter from the Sea (Apr 22, 2011)
- Episode 14x13: Around the World in 11 Minutes (Apr 25, 2011)
- Episode 14x14: Muffy and the Big Bad Blog (Apr 25, 2011)
- Episode 14x15: Arthur Unravels (Apr 26, 2011)
- Episode 14x16: All the Rage (Apr 26, 2011)
- Episode 14x17: D.W., Queen of the Comeback (Apr 27, 2011)
- Episode 14x18: In My Africa (Apr 27, 2011)
- Episode 14x19: Buster Spaces Out (Apr 28, 2011)
- Episode 14x20: The Long Road Home (Apr 28, 2011)
- Episode 15x01: Fifteen (Oct 10, 2011)
- Episode 15x02: I Wanna Hold Your Hand (Oct 11, 2011)
- Episode 15x03: Whistling in the Wind (Oct 11, 2011)
- Episode 15x04: Buster's Secret Admirer (Oct 12, 2011)
- Episode 15x05: The Last King of Lambland (Oct 12, 2011)
- Episode 15x06: Cents-less (Oct 13, 2011)
- Episode 15x07: Buster the Lounge Lizard (Oct 13, 2011)
- Episode 15x08: To Eat or Not to Eat (Oct 14, 2011)
- Episode 15x09: S.W.E.A.T. (Oct 14, 2011)
- Episode 15x10: Prunella the Pack Rat (Apr 16, 2012)
- Episode 15x11: What's in a Name? (Apr 16, 2012)
- Episode 15x12: Muffy's Classy Classics Club (May 23, 2012)
- Episode 15x13: Best Enemies (May 23, 2012)
- Episode 15x14: Buster's Garden of Grief (May 24, 2012)
- Episode 15x15: Through the Looking Glasses (May 24, 2012)
- Episode 15x16: The Butler Did...What? (May 25, 2012)
- Episode 15x17: The Trouble with Trophies (May 25, 2012)
- Episode 15x18: Grandpa Dave's Memory Album (Jun 15, 2012)
- Episode 15x19: Buster's Carpool Catastrophe (Jun 15, 2012)
Main cast, played by Siam Yu
- Episode 16x01: Based on a True Story (Oct 15, 2012)
- Episode 16x02: Flippity Francine (Oct 16, 2012)
- Episode 16x03: Muffy Takes the Wheel (Oct 16, 2012)
- Episode 16x04: All About DW (Oct 17, 2012)
- Episode 16x05: Blockheads (Oct 17, 2012)
- Episode 16x06: Get Smart (Oct 18, 2012)
- Episode 16x07: Baby Steps (Oct 18, 2012)
- Episode 16x08: Night of the Tibble (Oct 19, 2012)
- Episode 16x09: Read and Flumbergast (Oct 19, 2012)
- Episode 16x10: The Last Tough Customer (May 6, 2013)
- Episode 16x11: Brain's Chess Mess (May 6, 2013)
- Episode 16x12: Baseball Blues (May 7, 2013)
- Episode 16x13: Brain's Biggest Blunder (May 7, 2013)
- Episode 16x14: Buster's Book Battle (May 8, 2013)
- Episode 16x15: On the Buster Scale (May 8, 2013)
- Episode 16x16: Fern and the Case of the Stolen Story (May 9, 2013)
- Episode 16x17: Sue Ellen Vegges Out (May 9, 2013)
- Episode 16x18: So Funny I Forgot to Laugh (May 10, 2013)
- Episode 16x19: The Best Day Ever (May 10, 2013)
- Episode 17x01: Show Off (Nov 11, 2013)
- Episode 17x02: Dog's Best Friend (Nov 11, 2013)
- Episode 17x03: Adventures in Budylon (Nov 12, 2013)
- Episode 17x04: Ladonna Compson: Party Animal (Nov 12, 2013)
- Episode 17x05: Molina's Mulligan (Nov 13, 2013)
- Episode 17x06: Buster Bombs (Nov 13, 2013)
- Episode 17x07: Opposites Distract (Nov 14, 2013)
- Episode 17x08: Just the Ticket (Nov 14, 2013)
- Episode 17x09: All Thumbs (Nov 15, 2013)
- Episode 17x10: Kidonia (Nov 15, 2013)
- Episode 17x11: Speak Up, Francine! (Apr 21, 2014)
- Episode 17x12: Waiting for Snow (Apr 21, 2014)
- Episode 17x13: Pets and Pests (Apr 22, 2014)
- Episode 17x14: Go Fly a Kite (Apr 22, 2014)
- Episode 17x15: The Director's Cut (May 12, 2014)
- Episode 17x16: Crime and Consequences (May 12, 2014)
- Episode 17x17: Caught in the Crosswires (May 13, 2014)
- Episode 17x18: Framed! (May 13, 2014)
- Episode 17x19: Binky's Music Madness (May 14, 2014)
- Episode 17x20: Brain Freeze (May 14, 2014)
- Episode 18x01: The Friend Who Wasn't There (Sep 29, 2014)
- Episode 18x02: Surprise! (Sep 29, 2014)
- Episode 18x03: The Case of the Girl with the Long Face (Sep 30, 2014)
- Episode 18x04: The Substitute Arthur (Sep 30, 2014)
- Episode 18x05: The Tattletale Frog (Oct 1, 2014)
- Episode 18x06: D.W. & Bud's Higher Purpose (Oct 1, 2014)
- Episode 18x07: Best Wishes (Oct 2, 2014)
- Episode 18x08: The Tardy Tumbler (Oct 2, 2014)
- Episode 18x09: Fountain Abbey (Jan 26, 2015)
- Episode 18x10: Arthur Calls It (Jan 26, 2015)
- Episode 18x11: The Pageant Pickle (Jun 1, 2015)
- Episode 18x12: Some Assembly Required (Jun 1, 2015)
- Episode 18x13: Two Minutes (Jul 7, 2015)
- Episode 18x14: Messy Dress Mess (Jul 7, 2015)
- Episode 18x15: Whip. Mix. Blend. (Sep 7, 2015)
- Episode 18x16: Staycation (Sep 7, 2015)
- Episode 18x17: Shelter from the Storm (Part 1) (Sep 8, 2015)
- Episode 18x18: Shelter from the Storm (Part 2) (Sep 8, 2015)
- Episode 18x19: Super Saver (Sep 10, 2015)
- Episode 18x20: Tibbles to the Rescue (Sep 10, 2015)
- Episode 19x01: Brain's Brain (Jan 18, 2016)
- Episode 19x02: Brain Sees Stars (Jan 18, 2016)
- Episode 19x03: Sue Ellen Adds It Up (Jan 19, 2016)
- Episode 19x04: Wish You Were Here (Jan 19, 2016)
- Episode 19x05: Arthur's Toy Trouble (Jan 20, 2016)
- Episode 19x06: Spar for the Course (Jan 20, 2016)
- Episode 19x07: Carried Away (May 26, 2016)
- Episode 19x08: Dueling Detectives (May 26, 2016)
- Episode 19x09: Buster Isn't Buying It (Jun 2, 2015)
- Episode 19x10: One Ornery Critter (Jun 2, 2015)
- Episode 19x11: Maria Speaks (May 24, 2016)
- Episode 19x12: Postcards from Binky (May 24, 2016)
- Episode 19x13: Carl's Concerto (Apr 5, 2016)
- Episode 19x14: Too Much of a Good Thing (Apr 5, 2016)
- Episode 19x15: Francine's Cleats of Strength (Jun 3, 2015)
- Episode 19x16: Little Miss Meanie (Jun 3, 2015)
- Episode 19x17: Mr. Ratburn's Secret Identity (May 25, 2016)
- Episode 19x18: Besties (May 25, 2016)
- Episode 19x19: The Last Day (May 23, 2016)
- Episode 19x20: The Last Day (Part 2) (May 23, 2016)
Main cast, played by Max Friedman-Cole
- Episode 20x01: Buster's Second Chance (Oct 10, 2016)
- Episode 20x02: Arthur and the Whole Truth (Oct 10, 2016)
- Episode 20x03: Fern's Flights of Fancy (Oct 11, 2016)
- Episode 20x04: Cereal (Oct 11, 2016)
- Episode 20x05: He Said, He Said (Oct 12, 2016)
- Episode 20x06: Bunny Trouble (Oct 12, 2016)
- Episode 20x07: Bud's Knotty Problem (Oct 13, 2016)
- Episode 20x08: That's My Grandma! (Oct 13, 2016)
- Episode 20x09: Lend Me Your Ear (May 30, 2017)
- Episode 20x10: The Butler Did It (May 30, 2017)
- Episode 20x11: Prunella's Tent of Portent (May 31, 2017)
- Episode 20x12: Mutiny on the Pitch (May 31, 2017)
- Episode 20x13: The Hallway Minotaur (Jun 1, 2017)
- Episode 20x14: Ladonna's Like List (Jun 1, 2017)
- Episode 21x01: Binky's 'A' Game (Oct 24, 2017)
- Episode 21x02: Brain and the Time Capsule (Oct 24, 2017)
- Episode 21x03: The Master Builders (Oct 24, 2017)
- Episode 21x04: Francine and the Soccer Spy (Oct 26, 2017)
- Episode 21x05: Sue-Ellen & the Last Page (Oct 26, 2017)
- Episode 21x06: Muffy Misses Out (Feb 12, 2018)
- Episode 21x07: Arthur Takes a Stand (Feb 12, 2018)
- Episode 21x08: Slink's Special Talent (Feb 13, 2018)
- Episode 21x09: Take a Hike, Molly (Feb 13, 2018)
- Episode 21x10: The Lost Dinosaur (Feb 14, 2018)
- Episode 21x11: The Princess Problem (Feb 14, 2018)
- Episode 21x12: Invasion of the Soccer Fans (Feb 15, 2018)
- Episode 21x13: Pal and the Big Itch (Feb 15, 2018)
Main cast, played by Evan Blaylock
- Episode S21 Special: Arthur and the Haunted Tree House (Oct 23, 2017)
- Episode 22x01: Mr. Ratburn and the Special Someone (May 13, 2019)
- Episode 22x02: The Feud (May 13, 2019)
- Episode 22x03: When Rivals Came to Roost (May 14, 2019)
- Episode 22x04: The Longest Eleven Minutes (May 14, 2019)
- Episode 22x05: Muffy's House Guests (May 15, 2019)
- Episode 22x06: Binky Can't Always Get What He Wants (May 15, 2019)
- Episode 22x07: Muffy's Car Campaign (May 16, 2019)
- Episode 22x08: Truth or Poll (May 16, 2019)
- Episode 23x01: Fright Night (Oct 14, 2019)
- Episode 23x02: Citizen Cheikh (Oct 14, 2019)
- Episode 23x03: The Pea and the Princess (Oct 15, 2019)
- Episode 23x04: D.W. and Dr. Whosit (Oct 15, 2019)
- Episode 23x05: When Duty Calls, Part 1 (Oct 16, 2019)
- Episode 23x06: When Duty Calls, Part 2 (Oct 16, 2019)
- Episode S23 Special: An Arthur Thanksgiving (Nov 16, 2020)