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Thunderbirds Season 1 Episode 22

An unscrupulous investor attempts to recruit Lady Penelope into funding his automated, cross-country monorail building project. Jeff volunteers to ride the prototype, but he, Brains, and Tin-Tin find themselves trapped onboard, and with no possibility of escape, when it is discovered that the monorail train is speeding towards a stricken bridge.

Serie: Thunderbirds

Episode Title: Brink of Disaster

Air Date: 1966-02-24