• S1.E0 ∙ Official Unaired Pilot
• S1.E1 ∙ Downtown as Fruits/Eugene's Bike
• S1.E2 ∙ The Little Pink Book/Field Trip
• S1.E3 ∙ Arnold's Hat/Stoop Kid
• S1.E4 ∙ Helga's Makeover/The Old Building
• S1.E5 ∙ 6th Grade Girls/The Baseball
• S1.E6 ∙ Heat/Snow
• S1.E7 ∙ Operation Ruthless/The Vacant Lot
• S1.E8 ∙ The List/Haunted Train
• S1.E9 ∙ Mugged/Roughin' It
• S1.E10 ∙ Door #16/Arnold as Cupid
• S1.E11 ∙ Arnold's Christmas
• S1.E12 ∙ Benchwarmer/Cool Jerk
• S1.E13 ∙ Das Subway/Wheezin' Ed
• S1.E14 ∙ Tutoring Torvald/Gerald Comes Over
• S1.E15 ∙ Spelling Bee/Pigeon Man
• S1.E16 ∙ Olga Comes Home/Sally's Comet
• S1.E17 ∙ Abner Come Home/The Sewer King
• S1.E18 ∙ False Alarm/World Records
• S1.E19 ∙ Magic Show/24 Hours to Live
• S1.E20 ∙ Arnold's Valentine

• S2.E1 ∙ Save the Tree/New Teacher
• S2.E2 ∙ Helga's Love Potion/Gerald's Secret
• S2.E3 ∙ The Big Scoop/Harold's Kitty
• S2.E4 ∙ Longest Monday/Eugene's Pet
• S2.E5 ∙ Monkey Business/Big Caesar
• S2.E6 ∙ Ransom/Ms. Perfect
• S2.E7 ∙ Arnold's Halloween
• S2.E8 ∙ Arnold Saves Sid/Hookey
• S2.E9 ∙ Freeze Frame/Phoebe Cheats
• S2.E10 ∙ Mudbowl/Gerald Moves Out
• S2.E11 ∙ The High Life/Best Friends
• S2.E12 ∙ Steely Phil/Quantity Time
• S2.E13 ∙ Eating Contest/Rhonda's Glasses
• S2.E14 ∙ Helga's Boyfriend/Crush on Teacher
• S2.E15 ∙ Hall Monitor/Harold's Bar Mitzvah
• S2.E16 ∙ Coach Wittenberg/Four-Eyed Jack
• S2.E17 ∙ Eugene Goes Bad/What's Opera, Arnold?
• S2.E18 ∙ Tour de Pond/Teachers' Strike
• S2.E19 ∙ Part Time Friends/Biosquare
• S2.E20 ∙ Runaway Float/Partners

• S3.E1 ∙ Helga Blabs It All/Harold the Butcher
• S3.E2 ∙ Dangerous Lumber/Mr. Hyunh Goes Country
• S3.E3 ∙ Casa Paradiso/Gerald's Tonsils
• S3.E4 ∙ Arnold's Room/Helga vs. Big Patty
• S3.E5 ∙ Stinky Goes Hollywood/Olga Gets Engaged
• S3.E6 ∙ Curly Snaps/Pre-Teen Scream
• S3.E7 ∙ Grandpa's Birthday/Road Trip
• S3.E8 ∙ Sid's Revenge/Roller Coaster
• S3.E9 ∙ The Aptitude Test/Oskar Gets a Job
• S3.E10 ∙ Arnold Betrays Iggy/Helga and the Nanny
• S3.E11 ∙ Career Day/Hey Harold!
• S3.E12 ∙ Best Man/Cool Party
• S3.E13 ∙ Arnold & Lila/Grand Prix
• S3.E14 ∙ Arnold's Thanksgiving
• S3.E15 ∙ Helga's Show/The Flood
• S3.E16 ∙ Phoebe Takes the Fall/The Pig War
• S3.E17 ∙ Crabby Author/Rich Kid
• S3.E18 ∙ Girl Trouble/School Dance
• S3.E19 ∙ School Play

• S4.E1 ∙ Full Moon/Student Teacher
• S4.E2 ∙ Big Gino/Jamie O in Love
• S4.E3 ∙ Eugene's Birthday/Stinky's Pumpkin
• S4.E4 ∙ The Beeper Queen/Oskar Can't Read?
• S4.E5 ∙ Dinner for Four/Phoebe Skips
• S4.E6 ∙ Helga's Parrot/Chocolate Turtles
• S4.E7 ∙ Love and Cheese/Weighing Harold
• S4.E8 ∙ Back to School/Egg Story
• S4.E9 ∙ It Girl/Deconstructing Arnold
• S4.E10 ∙ Grudge Match/Polishing Rhonda
• S4.E11 ∙ Weird Cousin/Baby Oskar
• S4.E12 ∙ Grandpa's Sister/Synchronized Swimming
• S4.E13 ∙ Helga Sleepwalks/Fighting Families
• S4.E14 ∙ Headless Cabbie/Friday the 13th
• S4.E15 ∙ Veterans Day
• S4.E16 ∙ Helga on the Couch
• S4.E17 ∙ Dino Checks Out

• S5.E0 ∙ Arnold's Hat
• S5.E1 ∙ Monkeyman!/Buses, Bikes, and Subways
• S5.E2 ∙ Helga's Masquerade/Mr. Green Runs
• S5.E3 ∙ Sid the Vampire Slayer/Big Sis
• S5.E4 ∙ Bag of Money/Principal Simmons
• S5.E5 ∙ New Bully on the Block/Phoebe Breaks a Leg
• S5.E6 ∙ Parents Day
• S5.E7 ∙ Helga's Locket/Sid and Germs
• S5.E8 ∙ Suspended/Ernie in Love
• S5.E9 ∙ Summer Love
• S5.E10 ∙ Stuck in a Tree/Rhonda Goes Broke
• S5.E11 ∙ Beaned/Old Iron Man
• S5.E12 ∙ Arnold Visits Arnie/Chocolate Boy
• S5.E13 ∙ Harold vs. Patty/Rich Guy
• S5.E14 ∙ April Fool's Day
• S5.E15 ∙ Gerald's Game/Fishing Trip
• S5.E16 ∙ Married
• S5.E17 ∙ On the Lam/Family Man
• S5.E18 ∙ The Racing Mule/Curly's Girl
• S5.E19 ∙ The Journal
• S5.E20 ∙ Timberly Loves Arnold/Eugene, Eugene!
• S5.E21 ∙ Ghost Bride/Gerald vs. Jamie O.
• S5.E22 ∙ Simmons' Documentary/Big Bob's Crisis
• S5.E23 ∙ Phoebe's Little Problem/Grandpa's Packard
• S5.E32 ∙ Helga's Love Potion