| Timeline for 1921 |
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In 1921, a number of people important to the production of Doctor Who and its spin-offs either died or were born. Sometime this year, actor Edna Dore was born. People with known 1921 birthdays included:
- 23 January - Actor Kevin Stoney was born.
- 1 February - Actor Peter Sallis was born.
- 12 February - Actor Peter Whitaker was born.
- 27 February - Actor Richard McNeff was born.
- 15 April - Actor David Garth was born.
- 23 April - Actor Gerald Campion was born.
- 28 April - Actor Nancie Jackson was born.
- 25 May - Actor Peggy Dixon was born.
- 5 June - Director Bill Sellars was born.
- 19 July - Actor Michael Turner was born.
- 12 August - Actor Dermot Tuohy was born.
- 22 August - Actor Robert Marsden was born.
- 11 September - Actor Edwin Richfield was born.
- 20 September - Visual effects designer Jack Kine was born.
- 27 September - Producer Milton Subotsky was born.
- 29 December - Actor Robert Cawdron was born.