Doctor Who central character of a long-running British television science fiction series beginning in 1963, played first by William Hartnell and later by others including Tom Baker; the time-travelling Doctor Who is a Time Lord whose survival includes regular changes of physical appearance. He travels in the Tardis (Time And Relative Dimensions In Space) which resembles an old-fashioned London police telephone box.
Who's Who an annual biographical dictionary of contemporary men and women. It was first issued in 1849 but took its present form in 1897, when it incorporated material from another biographical work, Men and Women of the Time; earlier editions of Who's Who had consisted merely of professional lists, etc. The entries are compiled with the assistance of the subjects themselves, and contain some agreeable eccentricities particularly in the section labelled ‘Recreations’.