Summary: Olga Comes Home Helga's older sister Olga is back from college for her spring break. Sally's Comet Arnold and Gerald are wanting to see Sally's Comet, a comet that only becomes visible every 70 years. After sending away for a telescope by eating a lot of cereal, they end up with another delimma - how will they be able to see the comet with all the light pollution, unless they can get everyone to turn off their lights right before the comet appears?

KEYWORDS:

• Hey Arnold! Season 1 Episode 15,
• Hey Arnold! Olga Comes Home / Sally's Comet Online,
• Watch Episode 01x15

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