Hvor mange Tracy-brødre var det i thunderbirds?

Det var fem Tracy-brødrene i Thunderbirds:

* Scott Tracy (Captain of Thunderbird 1)

* Virgil Tracy (Pilot of Thunderbird 2)

* Alan Tracy (Pilot of Thunderbird 3)

* Gordon Tracy (Pilot of Thunderbird 4)

* John Tracy (International Rescue HQ Commander)