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Hey Arnold!
Season 4 · Episode 23
Grandpa's Sister
7.011mOctober 16, 1999
Phil's twin sister comes for a visit, bringing along an unsettled conflict between them.
Episodes
- Episode 1Full Moon
- Episode 2Student Teacher
- Episode 3Big Gino
- Episode 4Jamie O in Love
- Episode 5Eugene's Birthday
- Episode 6Stinky's Pumpkin
- Episode 7The Beeper Queen
- Episode 8Oskar Can't Read?
- Episode 9Dinner for Four
- Episode 10Phoebe Skips
- Episode 11Helga's Parrot
- Episode 12Chocolate Turtles
- Episode 13Love and Cheese
- Episode 14Weighing Harold
- Episode 15Back to School
- Episode 16Egg Story
- Episode 17It Girl
- Episode 18Deconstructing Arnold
- Episode 19Grudge Match
- Episode 20Polishing Rhonda
- Episode 21Weird Cousin
- Episode 22Baby Oskar
- Episode 23Grandpa's Sister
- Episode 24Synchronized Swimming
- Episode 25Helga Sleepwalks
- Episode 26Fighting Families
- Episode 27Headless Cabbie
- Episode 28Friday the 13th
- Episode 29Veterans Day
- Episode 30Helga on the Couch
- Episode 31Dino Checks Out