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The Cadwells appear only in the episode, Speed Shrinks. These kids are two twins similar to Hilda and Henry, but are somewhat villianous. They built a craft similar to the SR-71 Blackbird and use it's special features to sabotage and unfairly halt the other racers in order to win. The boy is voiced by, Michael Cera and the girl is voiced by Annick Obonsawin.

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