Within the fictional narrative, the Doctor is a Time Lord who travels through time and space in a dimensionally … See more

The character of the Doctor was created by BBC Head of Drama, Sydney Newman. The first format document for the programme that was to become Doctor Who – then provisionally titled The Troubleshooters – was writte… See more

Although Time Lords resemble humans, their physiology differs in key respects. Like other members of their race, the Doctor has two hearts (binary vascular system), a "respiratory bypass system" that allows the Doctor to g… See more

In the first episode, the Doctor's granddaughter Susan goes by the surname "Foreman", and the junkyard in which Barbara and Ian find him bears the sign "I.M. Foreman". When addressed by Ian with this na… See more

The recasting of actors playing the part of the Doctor is explained within the programme by the Time Lords' ability to regenerate after suffering illness, mortal injury or old age. The process repairs all damage an… See more

In early production documents, the Doctor was said to be 650 years old, although this was never stated on screen. By the time the Doctor did cite his age ("Let me see, in human terms, 400, yes, 450 years" in the serial … See more