Hey Arnold! (1996–2004)
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Arnold Betrays Iggy/Helga and the Nanny 

Arnold accidentally breaks a promise he made to Iggy and must deal with the consequences. / Big Bob hires a nanny for Helga. Helga fights the nanny at her own game and forces her to leave.


Joe Ansolabehere (developer), Steve Viksten (developer) | 4 more credits »


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Episode credited cast:
Joseph Ashton ... Iggy (voice)
Maria Bamford ... Iggy's Mother (voice)
Craig Bartlett ... Brainy (voice)
Jane Carr ... Inge
Dan Castellaneta ... Arnold's Grandpa (voice)
Sam Gifaldi ... Sid (voice)
Maurice LaMarche ... Big Bob Pataki (voice)
Anndi McAfee ... Phoebe Heyerdahl (voice)
Justin Shenkarow ... Harold Berman (voice)
Francesca Marie Smith ... Helga Pataki (voice) (as Francesca Smith)
Kath Soucie ... Miriam Pataki (voice) (as Kath E. Soucie)
Phillip Van Dyke ... Arnold (voice)
Christopher Walberg Christopher Walberg ... Stinky Petersen (voice)


Arnold Betrays Iggy: When Arnold sees Iggy wearing bunny pajamas, he promises he won't tell anybody - but when Sid and Stinky guess, Iggy refuses to forgive Arnold. Helga and the Nanny: Big Bob hires a nanny to take care of Helga after his wife has to do community service, but when Helga feels that Inga ruins her life, she tries to get rid of her. Helga succeeds, but is forced to come to terms with her character.

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TV-Y7 | See all certifications »






Release Date:

23 September 1998 (USA) See more »

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Did You Know?


Fans along with the show creator, Craig Bartlett detested the segment "Arnold Betrays Iggy" to the point Bartlett made the staff publicly apologize for it. Further, Bartlett and barred the segment from being shown on TV and greatly reduced Iggy's presence in the series, whom didn't have a speaking role until the final season. See more »


Miriam Pataki: I have to go work. Somewhere.
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User Reviews

No Just No
12 March 2019 | by youngrome-45057See all my reviews

So When I saw this episode yesterday the arnold betrays iggy episode the episode started fine as any arnold episode but as its get to the half and the ending i didnt enjoyed arnold getting laughed at when wearing bumny pajama i found this episode pretty stale and painful to watch Iggy literally betrayed arnold and everyone was laughing even stoop kid even though arnold helped stoop kid and i was almost literally about to punch iggy in the throat or in the face

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