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Walter O'Brien

While most adolescent boys hung out on the playground, Walter O'Brien was getting arrested for hacking into NASA. Over a decade later, Walter remains skeptical about helping Homeland Security again after things ended badly with Agent Gallo years ago. When the team learns that Walter has a sister battling MS they realize that he has a more personal reason for taking Gallo's high-paying job offer.

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Appearances

Scorpion
Main cast, played by Elyes Gabel
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