Thunderbirds was the fourth children's action-adventure
series made by AP Films (APF) for the British television
company ATV, and it remains by far their most successful
and enduringly popular production. Two seasons were produced,
comprising thirty-two episodes in total. Production commenced
in 1964 and the series premiered on British television
in September 1965. The show's title derived from a letter
written to his family by Anderson's older brother, while
he was serving in the United States during World War II.
In the letter, he referred to an American airbase called
"Thunderbird Field"; years later, Anderson decided
to use the name because of its romantic sound.
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