1920

January

 * 20 - Toshiko Sato's grandfather is born in Japan. (TW: Captain Jack Harkness)

December

 * 5 - Kathy Nightingale, having been touched by the Weeping Angels in 2007, is transported to Hull on this date. Stranded there, she proceeds to establish a new life for herself, eventually marrying Ben Wainwright and raising a family. (DW: Blink)

Unknown

 * At some point in the 1920s, Dr Judson had a serious accident that left him crippled and confined to a wheelchair. His friend, Millington (later Commodore Millington) continued to look after his old friend, but the relationship became increasingly bitter. (DW: The Curse of Fenric)

January

 * 3 - Peter Stephens is born.
 * 11 - Derek Sydney, who played Sevcheria in "The Romans," is born in Whitechapel, London.
 * 23 - Steven Scott is born.

March

 * 25 - Patrick Troughton, the second actor to portray the Doctor, is born at Mill Hill, London.
 * 27 - Bernard Wilkie is born.

April

 * 17 - Arnold Yarrow is born.

June

 * 6 - Aubrey Richards is born.
 * 17 - Beryl Reid is born.

September

 * 17 - Dinah Sheridan is born.

October

 * 7 - Will Stampe is born.
 * 16 - John Dearth, who provided the voice of BOSS in The Green Death and portrayed Lupton in Planet of the Spiders, is born.

November

 * 14 - Tom Bowman, who portrayed the part of a sentry in The Highlanders, is born.
 * 22 - Paul Erickson is born.

December

 * 1 - Eric Dodson, who portrayed the role of the headman in The Visitation, is born.

Unknown date

 * Robert Jewell, who operated Daleks in several episodes of Doctor Who as well as in both of the Dalek films starring Peter Cushing, is born.