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Hey Arnold! - Season 4 Episode 2
Helga's sister Olga comes home for spring break and becomes a classroom aid in Helga's class, much to Helga's chagrin.
- Quốc gia : United States of America
- Thể loại : Family, Animation, Comedy, Kids
- Giám đốc : Craig Bartlett
- Diễn viên : Spencer Klein, Francesca Marie Smith, Jamil Walker Smith, Olivia Hack, Anndi McAfee, Justin Shenkarow
