The originalheld the mantle from 1975
The Doctor (no canonical real name; this is the Fourth Doctor incarnation, played by Tom Baker)
Powers. Time Lord physiology: regeneration, near-superhuman intellect, two hearts, respiratory bypass, time/space travel via the TARDIS; uses the sonic screwdriver rather than offensive powers
Origin
The Fourth Doctor is a Time Lord from the planet Gallifrey who travels time and space in the TARDIS, a craft disguised as a blue police box. Regenerated into Tom Baker's iconic incarnation, he explores the universe alongside companions Sarah Jane Smith and Harry Sullivan, armed with his sonic screwdriver and vast intellect.