1951

History of the Doctor Who Universe

 * The last Witchcraft Act is repealed in Great Britain ("The Daemons").


 * The radio telescope is invented ("Pyramids of Mars").


 * "Timewyrm: Exodus" (opening and conclusion)


 * "Endgame"

April

 * 13 - Peter Davison, the fifth actor to portray the Doctor, is born Peter Moffett at Streatham, London.


 * 20 - Louise Jameson, who portrayed companion Leela, is born at Wanstead, London.

June

 * 28 - Lalla Ward, who portrayed Princess Astra in "The Armageddon Factor" before assuming the role of Romana, is born Lady Sarah Ward, daughter of Lord Bangor, in London.