Third PhDoctor is the third incarnation of the Alpha-Omegatrix's DNA sample of a Time Lord, also known as Gallifreyan, from Gallifrey.
He was exiled by the Celestialsapiens on Earth for much of his life. The technological limits of the time period often made him frustrated and bitter. However, he retained his endearing compassion toward human and alien companions.
When the TARDIS finally deposited the dying Time Lord back on Earth, he promptly collapsed and died. Destiny tearfully closed his eyes. However, Socium, decided to give PhDoctor "a little push". PhDoctor started breathing again and regenerated into his next incarnation.
He looks similar to Richard in the first series, although has a black jacket, red undershirt, and red eyes. The Alpha-Omegatrix is on his wrist.
As a Time Lord, he has many powers. A binary vascular system, immunity to the vacuum of space, increased sound resilience, healing coma, radiation absorption, high electrocution immunity, telepathy, and regeneration up to 10 times, having used 2 incarnations already.
The Alpha-Omegatrix gives him what most Time Lords have, a sonic screwdriver, a psychic paper, and a TARDIS, Time And Relative Dimension In Space. This gives him a few controls over things, ebducing someone into seeing what he wants, and time-space travel.
He has fatal reactions to one of his hearts not working.
Although he can regenerate 12 times, after his 13th incarnation, Richard does not have access to him.
- His personality and death are that of the Third Doctor.