Thunderbird 5 was the monitoring satellite belonging to the 'Thunderbirds' rescue organisation, International Rescue. Manned by space monitor John Tracy, TB5 was usually the first to hear of any global disasters; and John often used the station to keep an eye on events that could develop into an emergency.
Thunderbird 5 was badly damaged by a missile launched by The Hood and his goons - as part of his ultimate plan to invade Tracy Island, by luring the other Thunderbirds elsewhere...
Whether it was fixed or not, or otherwise returned to active service, remains unclear.
Crew: Usually 1, but can support up to 5
Diameter: 75 metres (246 feet)
Engines: 1 booster rocket (to lift Thunderbird 5 to a higher orbit); 32 attitude-control rockets (for minor position adjustments)
Height (including scanning arrays): 69 metres (226 feet)
Length (including docking port): 108 metres (354 feet)
Orbit: geostationary orbit 35,790 km (22,226 miles) above the Pacific Ocean
Power source: Hackenbacker series 300 fusion reactor
Weight: 869 tons