1925

June

 * 11 - The Fifth Doctor, Tegan, Nyssa, and Adric arrived at Cranleigh Hall, in rural England, for an afternoon of cricket. (DW: Black Orchid) Ace also visited, in order to obtain one of the segments of the Key to Time. (DWM: Time & Time Again)

Undated

 * Jack Harkness was active in this year, as shown by photos of him found in the CIA Archive. (TW: The New World)

January

 * 5 - Wolfe Morris is born.

February

 * 18 - Russell Hunter is born.

March

 * 2 - Bernard Price is born.
 * 7 - George A. Cooper, who played Cherub in The Smugglers, is born in Leeds, England.
 * 26 - Barry Letts is born.
 * 28 - Morris Perry is born.
 * 29 - Frederick Treves is born.

April

 * 14 - William Lucas is born.

May

 * 14 - Tristram Cary is born.
 * 14 - Ysanne Churchman is born.
 * 14 - Gordon Gostelow is born.
 * 15 - Roy Stewart is born.

July

 * 10 - David Nettheim is born.
 * 17 - Hugh David is born.
 * 19 - Ivor Roberts is born.
 * 27 - Harry Towb is born.

August

 * 11 - Brian Badcoe is born.

September

 * 2 - Neil Seiler is born.
 * 19 - Dallas Cavell is born.
 * 22 - Stratford Johns is born.

November

 * 7 - John Stratton who played Shockeye in The Two Doctors, is born in Clitheroe, Lancashire, England, UK.
 * 18 - News reporter Alex MacIntosh, who played himself in Day of the Daleks, is born.

December

 * 24 - Innes Lloyd is born.

Unknown date

 * James Garbutt is born.
 * Neil Hallett is born.
 * Peter Thompson is born.
 * Construction of the eccentric Welsh resort village of Portmeirion begins. Best known as the filming location for the 1960s TV series The Prisoner, the village would also be used as a filming location for the Doctor Who serial The Masque of Mandragora.