2021 (releases)

January

 * 1 January - Revolution of the Daleks was first broadcast on BBC One.
 * 1 January - Resurrection of the Author was published by Goblin Studios.
 * 1 January - VOR 143 was first published by Big Finish Productions.
 * 2 January - Masterful was first released by Big Finish.
 * 6 January - The audiobook version of The Big Hunt was first released by Big Finish.
 * 7 January - DWM 560 was first released by Panini Comics.
 * 7 January - The audiobook version of Doctor Who and the Hand of Fear was first released by BBC Audio.
 * 13 January - The Torchwood audio story Coffee was first released by Big Finish.
 * 14 January - Doctor Who and Science: Essays on Ideas, Identities and Ideologies in the Series was first published by McFarland.
 * 19 January - Colony of Fear was first released by Big Finish.
 * 20 January - The Fourth Doctor Adventures Series 10: Volume 1 was first released by Big Finish.
 * 21 January - 24 Carat was first released on the official Doctor Who YouTube channel.
 * 21 January - The Italian paperback edition of Time Trials: The Wolves of Winter was first released by Titan Comics.
 * 22 January - Hunky Dory was released on Amazon.
 * 22 January - Kklak! - The Doctor Who Art of Chris Achilléos was released as a limited edition hardback by Candy Jar Books.
 * 22 January - The soundtrack to The Edge of Time was released by Demon Records.
 * 22 January - Case File - Stacey Facade was released on YouTube by BBV Productions.
 * 25 January - Revolution of the Daleks was first released on DVD and Blu-ray by the BBC.
 * 26 January - The Science of Doctor Who: The Scientific Facts Behind the Time Warps and Space Travels of the Doctor was first published by Skyhorse Publishing.
 * 27 January - The Diary of River Song: Series Eight was first released by Big Finish.
 * 28 January - The Second Monsters Collection was first released by BBC Audio.

February

 * 2 February - The audiobook version of The Tree of Life was first released by Big Finish.
 * 4 February - DWM 561 and Doctor Who and the Library of Time were first released by Panini Comics.
 * 4 February - The Kairos Ring and the audiobook version of The Savages were first released by BBC Audio.
 * 4 February - Time War: Volume Four was first released by Big Finish.
 * 9 February - The Blazing Hour was first released by Big Finish.
 * 10 February - The Fourth Doctor Adventures Series 10: Volume 2 was first released by Big Finish.
 * 14 February - The Genuine Article was first released on the Doctor Who: Lockdown! YouTube channel.
 * 14 February - Will you be the Master's valentine...? was first released via the Big Finish Twitter account.
 * 16 February - Drive was first released by Big Finish.
 * 18 February - Dalek Combat Training Manual was first released by BBC Books.
 * 19 February - The vinyl version of Horror of Fang Rock was first released by Demon Music Group.
 * 24 February - Doctor Who: Chronicles - 1965 was first released by Panini Comics.

March

 * 4 March - DWM 562 was first released by Panini Comics.
 * 4 March - Ghost Town and Paper Moon were first released by BBC Books.
 * 8 March - The Collection: Season 8 was released in a Blu-ray box set.
 * 10 March - Stranded 2 was first released by Big Finish.
 * 11 March - The novelisations of Dalek, The TV Movie, The Witchfinders, The Crimson Horror and abridged versions of Resurrection of the Daleks, The Pirate Planet and Revelation of the Daleks were released by Target Books.
 * 16 March - The End of the Beginning and Soul Music were first released by Big Finish.
 * 17 March - Return of the Cybermen and The Doomsday Contract were first released by Big Finish.
 * 18 March - The Voice of Many Angels was published on the Into The Unknown tie-in website.
 * 19 March - The Lonely Assassins was first released by BBC Studios.
 * 19 March - 2020: The Movie was first transmitted during BBC One's Comic Relief night.
 * 24 March - The Torchwood audio story Lease of Life was first released by Big Finish.
 * 30 March - Master! was first released by Big Finish.

April

 * 1 April - DWM 563 was first released by Panini Comics.
 * 1 April - The Planet of Dust & Other Stories and the audiobook version of Time-Flight were first released by BBC Audio.
 * 8 April - The Lone Centurion: Volume One was first released by Big Finish.
 * 13 April - The Dalek Protocol was first released by Big Finish.
 * 14 April - Dalek Universe 1 was first released by Big Finish.
 * 14 April - Part one of the Missy comic story The Master Plan was first released by Titan Comics.
 * 16 April - Echoes of Extinction was first released by Big Finish.
 * 19 April - Series 8 was released in a Steelbook Blu-ray box set.
 * 21 April - The Torchwood audio story Gooseberry was first released by Big Finish.
 * 27 April - The First Doctor Adventures: Volume Five was first released by Big Finish.
 * 29 April - DWM 564 was first released by Panini Comics.

May

 * 1 May - VOR 147 was first published by Big Finish.
 * 5 May - The audiobook version of Fellowship of Ink was first released by Big Finish.
 * 6 May - The audiobook version of Doctor Who and the Underworld and the re-issue of The Lost TV Episodes - Collection Five were first released by BBC Audio.