Alan Tracy is the youngest of the Tracy brothers, and pilot of Thunderbird 3. Alan was born on 12 March 2044 and is twenty-one years old. Scott nearly always accompanies Alan on his missions into space.
As the youngest Alan is the most immature and headstrong of all his brothers, he is often teased by his brothers (see End Of The Road), and goes straight into dangerous situations (see Attack Of The Alligators!).
Alan is named after Astronaut Alan B. Shepard of the Freedom 7 Mercury flight.