Third Doctor
From Tardis Wiki, the free Doctor Who reference
Biography
The Third Doctor made his first appearance in Spearhead from Space, where he fell out of the TARDIS in the Second Doctor's clothes. This was most likely a forced regeneration by the Time Lords.
Characteristics
The Third Doctor was heavily involved with UNIT while stuck on Earth, though he tended to have problems with the Brigadier's destructive manner. The Third Doctor was also the first to meet the reacting villian, The Master.
Habits and Quirks
The Third Doctor was known for his love of gadgets and a passion for his vintage car Bessie. He was the most action oriented, using a wide variety of martial arts including Venusian Akido.