1951

Dates unknown

 * The last Witchcraft Act is repealed in Great Britain (DW: The Dæmons).
 * The radio telescope is invented (DW: Pyramids of Mars).
 * The Doctor and Ace attend the Festival of Britain (NA: Timewyrm: Exodus)
 * The Doctor also passes through the Festival (NA: Endgame)

Late Spring

 * Between 20th April and 20th May - Birth of Sarah Jane Smith. (Date given: SJA: Secrets of the Stars, SJA: The Temptation of Sarah Jane Smith.)

August

 * 18 - Eddie and Barbara Smith, parents of Sarah Jane, die in a car accident. (SJA: The Temptation of Sarah Jane Smith)

April

 * 13 - Peter Davison, who portrayed Fifth Doctor is born as 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 and the second incarnation of companion Romana is born Lady Sarah Ward, daughter of Lord Bangor, in London.