Watch Thunderbirds Are Go! season 1 episode 21 online. It is 2060 and once again Halley’s Comet is passing close to Earth. A businessman and his personal assistant decide to mark Halley’s comet’s latest orbit past Earth by flying their exclusive flying yacht beyond the atmosphere to chase it. Moments later, the pair send out a distress call as they find themselves trapped in the comet’s tail, prompting Alan and Scott to take Thunderbird 3 out to tow the thrill-seekers to safety.
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