For anyone who can't tell their Tennants from their TARDISes, here's the Euronews Culture guide to everything you need to know about Doctor Who.
Doctor Who actors in order - in production and chronological order
The Master (Doctor Who) - Wikipedia
Doctor Who' Doctors: Every Actor Who's Played the Role, in Order
Doctor Who' Doctors: Every Actor Who's Played the Role, in Order
Doctor Who actors in order: who came first, Pertwee, Baker or Troughton?