Thunderbird creator Gerry Anderson spent between US$60 000 and US$70 000 for each of the thirty-two episodes and used more than two hundred different models of the five Thunderbird vehicles.
In Thunderbirds Lady Penelope's unique pink Rolls Royce is based on the same twin front-wheel-steering Bedford coach used in the escape scene of The Italian Job (1969).
The designers of the Concorde were such big fans of the Thunderbirds that they used the Thunderbirds theme song at the plane's unveiling.
The only time Rolls Royce have ever officially sanctioned the use of their famous vertical grille and 'Spirit of Ecstasy' statue was on Lady Penelope's pink 6-wheeled Royce in Thunderbirds.
All five Tracy sons in Thunderbirds were named after famous pioneering astronauts of the 1960's: Scott after Scott Carpenter; Virgil after Virgil Grissom; Alan after Alan Shepard; Gordon after Gordon Cooper; and John after John Glenn.
Before the filming of a scene on Thunderbirds could begin the strings on each marionette had to be painted out to match the set.
Did you know that the marionette of Scott Tracy from Thunderbirds was sculpted after Sean Connery?