Episode Title:Skyhook.Episode Description:CIRRUS (Climate Research of the Upper Stratosphere), a weather station built cheaply with a lack of safety features, has a sudden failure in its stabilising fans, causing its balloons to lift the station higher into the atmosphere. Attempts at rescuing the crew by Thunderbirds 1 and 2 are thwarted by both the station's lack of protective equipment and it rising above the limits of the Thunderbirds' working altitude. Thunderbird 3 also fails when it is damaged by the station's fans breaking away, leaving John in Thunderbird 5, using the space elevator as a fishing hook, as the weather station's last hope.