1951

Dates unknown

 * The radio telescope was invented. (DW: Pyramids of Mars)
 * Mrs Randall was given a prize as "Miss Ealing". (SJA: Eye of the Gorgon)

April

 * The First Doctor, Ian Chesterton and Barbara Wright moved a replica of the Stone of Scone to Arbroath Abbey, where it was accidentally broken in two. (ST: Set in Stone)

May

 * Before the 25th - The Seventh Doctor and Ace attended the Festival of Britain. (NA: Timewyrm: Exodus)
 * The Eighth Doctor also passed through the Festival at the same time. He briefly saw his past self and his former companion but did not recognise either of them. (EDA: Endgame)

Late Spring

 * Between 20 April and 20 May - Sarah Jane Smith was born. (SJA: Secrets of the Stars, SJA: The Temptation of Sarah Jane Smith)

June

 * 22 - The last Witchcraft Act was repealed in Great Britain. (DW: The Dæmons)

August

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

January

 * 7 - Helen Worth was born.

March

 * 9 - Chris Clough was born.

April

 * 13 - Peter Davison, who portrayed Fifth Doctor, was born as Peter Moffett at Streatham, London.
 * 20 - Louise Jameson, who portrayed companion Leela, was born at Wanstead, London.

June

 * 4 - David Yip was born.
 * 24 - David Rodigan was born.
 * 24 - Simon Rouse was born.
 * 28 - Lalla Ward, who portrayed Princess Astra and the second incarnation of Romana, was born Lady Sarah Ward, daughter of Lord Bangor, in London.

July

 * 13 - Joseph Lederer is born.
 * 17 - Dave Chapman is born.
 * 20 - Jeff Rawle is born.

September

 * 24 - David Banks is born.

December

 * 21 - Jane How is born.

Date unknown

 * Angela Bruce is born.
 * Nigel Humphreys is born.