Doctor Who through the ages - all twelve Doctors

19 August 2014 Last updated at 15:54 BST

From the 1st to the 12th, Newsround looks back at all of the time-travelling Doctors.
All twelve Doctors (1963 - 2013)
Doctor Who celebrated its 50th anniversary last year with a special episode of the sci-fi series. Have a look through this gallery to find out more about the 12 incarnations of the time travelling Doctor and some of his greatest moments.
William Hartnell as the Doctor
First Doctor: William Hartnell (1963–1966). The First Doctor appeared to be a frail old man but don't be fooled. He played deadly games with the Celestial Toymaker, he fooled Roman emperors and French revolutionaries and foiled everything the evil Daleks could throw at him.
Patrick Troughton
Second Doctor: Patrick Troughton (1966–1969). The Second Doctor was very different to his predecessor. A more playful attitude disguised dark undercurrents and a sharp mind. He was famous for freezing the emotionless Cybermen into their ancient tombs but he was forced into exile after being tried for interference by the The Time Lords.
Jon Pertwee
Third Doctor: Jon Pertwee (1970–1974). The Third Doctor began his exile on earth with a new face. He was confident, bold and brash, but with a soft fatherly side. He helped the extraterrestrial taskforce Unit combat living plastic Autons, Sea Devils and polluted giant green maggots, as well as fellow renegade Time Lord, The Master.
Tom Baker
Fourth Doctor: Tom Baker (1974–1981). From witnessing the genesis of the Daleks to preventing the death of the universe at Logopolis, the Fourth Doctor was an adventurer on an epic scale. It was this incarnation of the Doctor that found and reassembled the Key to Time, and was invested as Lord President of the High Council of Time Lords. Tom Baker is currently the longest-serving Doctor.
Peter Davison
Fifth Doctor: Peter Davison (1981–1984). Clever, considered and kind, the Fifth Doctor's world was one of fascination and science. And it was in this fifth body that the Doctor was reunited with his past selves to fight in the Death Zone on Gallifrey.
Colin Baker
Sixth Doctor: Colin Baker (1984–1986). The Sixth Doctor was an explosion of colours, words and emotions. Passionate and sometimes quick to anger, this was a Doctor you did not want to make enemies with. He tangled with the corporate greed of the slimy Sil, and defeated the amoral Gallifreyan scientist known only as the Rani.
Sylvester McCoy
Seventh Doctor: Sylvester McCoy (1987–1989, 1996) The seventh incarnation of the Doctor was both a spoon-playing clown and a master of deep dark secrets. He toppled empires in a single night, entertained in the circus of the Gods of Ragnarok and played chess with the ancient and evil Fenric.
Paul McGann
Eighth Doctor: Paul McGann (1996, 2013). The Doctor regenerated into his Eighth form in a hospital morgue, on December 31, 1999 and teamed up with Grace Holloway to save the world from being pulled inside-out by the Master’s hijacking of the Tardis. Paul McGann only played the Doctor once, in a 1996 Doctor Who film, before reappearing in a special clip for the 2013 anniversary.
The War Doctor John Hurt
The War Doctor: John Hurt (50th anniversary episode) Although not technically classed as an official Doctor, The War Doctor's origin is explained in the mini-episode "The Night of the Doctor" whereby the eighth Doctor wishes to regenerate as a Warrior, instead of a Doctor. This is confirmed when he regenerates as John Hurt, whose first words are "Doctor no more." He then joins the tenth and eleventh Doctors in an attempt to stop the war on their home planet of Gallifrey.
Christopher Eccleston
Ninth Doctor: Christopher Eccleston (2005) The sole survivor of the Last Great Time War, scarred by the terrible things he’d seen and done, the Ninth Doctor was an intense and emotional incarnation. He took Rose Tyler to see the end of the world, inspired Charles Dickens and showed that for once, everybody could live.
David Tennant and Billie Piper
Tenth Doctor: David Tennant (2005–2010). Waking on Christmas Day in his new form, the tenth Doctor fought the Sycorax high above London. Travelling with Rose and Mickey he battled Cybermen, werewolves and possibly even the Devil itself. David was recently voted the nation's favourite Doctor.
Matt Smith
Eleventh Doctor: Matt Smith (2010–2013). Born, “still cooking”, into a crashing TARDIS, the Eleventh Doctor hurtled into the life of Amy Pond. The Doctor and Amy battled new paradigm Daleks in World War Two, Weeping Angels by the thousand and the depression in Vincent van Gogh’s mind.
The twelfth Doctor Peter Capaldi.
The Twelfth Doctor: Peter Capaldi (2013-present) The twelfth Doctor still remains a mystery, although it is hinted that he will be a more serious Doctor. Peter first appeared as the Doctor briefly in the 50th anniversary special episode, but had appeared as minor characters in previous series. His companion will be the mysterious Clara Oswald.