On 20 January, a number of people important to the production of Doctor Who and its spin-offs either died or were born.
- 1902 - Actor Stephen Jack was born.
- 1930 - Actor Henry Woolf was born.
- 1934 - Actor Tom Baker was born.
- 1936 - Actor Ralph Watson was born.
- 1950 - Actor Liza Goddard was born.
- 1970 - Actor Mitch Benn was born.
- 1985 - Actor Olivia Hallinan was born.
- 1990 - Actor John Maxim died.
- 2010 - Visual effects designer Ian Scoones died.
- 2016 - Actor Dennis Plenty died.