John Tracy is the second eldest of the Tracy brothers just after Scott, and is the pilot of Thunderbird 5. John was born on 8 October 2040 and is twenty-five years old.
Personality
Being the solitary monitor aboard Thunderbird 5, John often seems distanced from his fellow siblings. In Operation Crash Dive, even though he is on Tracy Island, he does not seem to join in with his brothers at the shooting range. As the second eldest John seems to be quite mature, he is described as the quietest and most intellectual of the Tracy brothers.
Origins
John is named after Astronaut John Glenn who was the first American to orbit the Earth, on the Friendship 7 Mercury flight.
Voices
John is voiced throughout the series by Ray Barrett. It is only in Thunderbird 6 where he is voiced by Keith Alexander, due to the fact Ray Barrett had gone back to Australia.