Arnold betrays Iggy/Helga and the nanny – Hey Arnold! (Season 3, Episode 6) | Apple TV (CA)
The Nicktoons Family -- "Hey Arnold!"
Arnold Betrays Iggy | Hey Arnold Wiki | Fandom
The thing that I thought was the most messed about the whole episode "Arnold Betrays Iggy" was the fact that the adults were laughing at Arnold too (including his grandpa) : r/HeyArnold