Human: In the TV show, ‘The Doctor’, who is the Doctor? Assistant: 
The Doctor is a Time Lord, and is the title character of the TV show The Doctor. He is a humanoid alien from the planet Gallifrey who travels through time and space in a ship called the TARDIS. He is a Time Lord, which means he is a member of a race that has been around for a very long time. He is the last of his people, and is currently a 900 year old man.