article: Doctor (Doctor Who)
links: Richard E. Grant Tom Baker Colin Baker Jon Pertwee BBC Peter Cushing Barbara Wright (Doctor Who) Susan Foreman Extraterrestrial life Jodie Whittaker Space (physics) Paul McGann Robbery Christopher Eccleston Ncuti Gatwa John Hurt Ian Chesterton Sylvester McCoy Matt Smith (actor) William Hartnell Patrick Troughton David Tennant Peter Capaldi Doctor Who Doctor Who companions Peter Davison