For the effects shots of the burning "Thunderbird 2" crash-landing on Tracy Island, the crew tried to prevent damage to the "Thunderbird 2" model by covering it with foil coated in rubber gel and igniting the foil rather than the model itself. Nevertheless, the model was seriously burnt. To allow filming to continue, effects assistants Mike Trim and Roger Dicken hurriedly repaired the model by applying green Plasticine to the damaged portions, in so doing greatly increasing the model's weight. Trim has since commented that this was unnecessary because on screen "there was so much smoke, you couldn't really have told whether the far side was completely missing, let alone burnt." Later, a new model was built.