Doctor (Doctor Who)

Doctor Who universe character
The Doctor
Race	Time Lord
Home planet	Gallifrey
Home era	Rassilon Era
First appearance	An Unearthly Child
Actor	William Hartnell; Patrick Troughton; Jon Pertwee; Tom Baker; Peter Davison; Colin Baker; Sylvester McCoy; Paul McGann; John Hurt; Christopher Eccleston; David Tennant (first); Matt Smith; Peter Capaldi; Jodie Whittaker; David Tennant (second); Ncuti Gatwa (forthcoming)

The Doctor is the central character in the long-running BBC science fiction television series Doctor Who.

They are an alien, a Time Lord from the planet Gallifrey. The Doctor travels in their space-time-ship, the TARDIS, (Time And Relative Dimensions In Space) with which they can go anywhere in time and space. Because the TARDIS's chameleon circuit is broken, it looks like an old British police-call box permanently. The Doctor often takes other people with them, who are usually called "companions" or "assistants". The companions are always 21st century humans in the modern series, however the classic series often had human-looking aliens or people from the past or future. The most recent companion is Ruby Sunday.