On 13 December, a number of things set in or relevant to the Doctor Who universe were released or published.
- 1975 - Part four of The Android Invasion was first broadcast on BBC1.
- 1975 - Part two of the TV Comic story The Dalek Revenge was first published.
- 1980 - Part four of State of Decay was first broadcast on BBC1.
- 2006 - Part two of the Doctor Who Adventures comic story A Date to Remember was first published.
- 2006 - The Doctor Who: Battles in Time comic story The Glutonoid Menace was first published.
- 2007 - Part two of the Doctor Who Adventures comic story A Klytode Christmas was first published.
- 2013 - Daleks' Invasion Earth 2150 A.D. was released to VOD with added comedy commentary by RiffTrax.
- 2016 - Absolute Power and Quicksilver were first released by Big Finish.