2021 (production)

January

 * 1 January - The BBC announced the casting of John Bishop as new companion Dan Lewis.
 * 5 and 7 January - Big Finish's audio anthology The Eleven was recorded remotely.
 * 6 January - Big Finish's audio drama anthology The Stuff of Nightmares was recorded.
 * 11, 12 and 18 January - The Big Finish audio anthology Respond to All Calls was recorded remotely.
 * 18 January - Big Finish announced the fourteenth series of Jago & Litefoot, adapted as an audiobook anthology.
 * 19 January - The BBC announced Titan Comics' comic strip series Missy.
 * 21 January - The BBC announced the Blu-ray box set The Collection: Season 24.
 * 21 January - Big Finish announced the audio anthology The Eleven.
 * 27 January - Recording for Big Finish's audio anthology Forty: Volume 1 was recorded remotely.
 * 28-29 January - Big Finish's UNIT: Nemesis box set Between Two Worlds was recorded.
 * 29 January - Recording for the Torchwood audio story Gooseberry was recorded remotely.
 * 29 January - Big Finish announced the audiobook series The Audio Novels.

February

 * 3 February - Big Finish announced the UNIT: The New Series audio series Nemesis.
 * 11 February - Big Finish announced the seventh series of the audio series The Early Adventures.
 * 11 and 18 February - Big Finish's The War Master audio anthology Escape from Reality was recorded.
 * 15-19 February - The Big Finish audio story The God of Phantoms was recorded remotely.
 * 22 February - Big Finish's audiobook anthology Short Trips: Volume 11 was recorded.
 * 22, 23 and 25 February - Big Finish's audio anthology Old Friends was recorded remotely.
 * 23 February - Big Finish's Torchwood - Monthly Range audio story Madam, I'm was recorded remotely.
 * 24 February - Big Finish's audio anthology The Stuff of Nightmares was recorded.

March

 * 4 March - Big Finish announced an audio adaptation of the unproduced TV story Mind of the Hodiac.
 * 8 March - Big Finish's Torchwood - Monthly Range audio story The Five People You Kill in Middlesbrough was recorded remotely.
 * 10 March - The BBC announced the steelbook of Series 8.
 * 22 March - Big Finish's audio anthology The Third Doctor Adventures: Volume Eight was recorded.
 * 24 March - The BBC announced the reissues of The Collection: Season 12 and Season 19.
 * 25 March - The BBC announced the two-part anthology The Essential Terrance Dicks.
 * 25 March - Big Finish announced the audio story The God of Phantoms.

April

 * 6-8 April - The Big Finish audio story The Auton Infinity was recorded remotely.
 * 7 April - Big Finish's Torchwood - Monthly Range audio story Curios was recorded remotely by Mayfield Records and Will Wadham.
 * 12, 14 and 19 April - The Big Finish audio story Watchers was recorded remotely.
 * 13 April - The BBC announced the vinyl version of The Ice Warriors.
 * 21, 28 and 29 April - Big Finish's audio anthology The Third Doctor Adventures: Volume Eight was recorded.
 * 23 April - Big Finish announced the Torchwood - Monthly Range audio story Empire of Shadows.
 * 26, 28 and 29 April - Big Finish's Torchwood Soho audio story Ashenden was recorded.
 * 28 April - Big Finish announced the two-part Fifth Doctor Adventures audio anthology Forty.
 * 29 April - Big Finish announced The Audio Novels audiobook Watchers.

May

 * 4 and 6 May - 2021 - Big Finish's The War Master audio anthology Escape from Reality was recorded.
 * 5 May - Big Finish's audio anthology Peladon was recorded.
 * 13-14 May - Big Finish's Missy audio anthology Missy and the Monk was recorded remotely.
 * 15 May - The BBC announced the audiobook anthology K9 Audio Annual.
 * 19-21 May - Big Finish's The Doctor Chronicles audio anthology Timejacked! was recorded at the Soundhouse.
 * 24 May - The BBC announced the reissues of The Collection: Season 10 and Season 18.

June

 * June - Big Finish's The War Master audio anthology Self-Defence was recorded.
 * 3 June - Big Finish announced the audio anthology Peladon.
 * 7 June - Big Finish's audiobook anthology Short Trips: Volume 11 was recorded.
 * 8-10, 15 and 16 June - Big Finish's The Diary of River Song audio anthology New Recruit was recorded at the Soundhouse.
 * 9 June - Big Finish announced the Missy audio anthology Missy and the Monk.
 * 11 June - Big Finish's audiobook anthology Short Trips: Volume 11 was recorded.
 * 19 June - The BBC announced the vinyl version of The Myth Makers.
 * 21-23 June - Big Finish's audio anthology Water Worlds was recorded at the Soundhouse.
 * 29 June - Big Finish announced the Jenny: The Doctor's Daughter audio anthology Still Running.

July

 * July - Big Finish's Jenny: The Doctor's Daughter audio anthology Still Running was recorded remotely.
 * July - Big Finish's The War Master audio anthology Self-Defence was recorded.
 * 1 July - The BBC announced the animated recreation of the missing episodes of The Evil of the Daleks, scheduled for release on 27 September.
 * 7 July - Big Finish announced The Diary of River Song audio anthology New Recruit.
 * 8 July - Big Finish's Torchwood - Monthly Range audio story The Great Sontaran War was recorded at Southea Studios and remotely.
 * 8 and 26 July - Big Finish's Torchwood audio story The Red List was recorded at the Soundhouse and remotely.
 * 13 July - Big Finish's Torchwood Soho audio story Ashenden was recorded.
 * 13-14 July (plus additional pick-up dates) - Big Finish's audio anthology Stranded 3 was recorded at the Soundhouse and remotely.
 * 21 July - Big Finish announced the audio box set The Year of Martha Jones.
 * 25 July - Jodie Whittaker, Mandip Gill, John Bishop, Chris Chibnall and Jacob Anderson attended the virtual San Diego Comic-Con to promote Series 13.
 * 26 July - Big Finish announced the Torchwood Soho audio story Ashenden.
 * 27 July - Big Finish announced the Torchwood - Monthly Range audio story The Great Sontaran War.
 * 29 July - The BBC confirmed that Jodie Whittaker and showrunner Chris Chibnall would be leaving Doctor Who after Series 13 and the 2022 Specials.
 * 30 July - The audio commentary for Galaxy 4 was recorded.

August

 * August - Big Finish's The War Master audio anthology Self-Defence was recorded.
 * 3-5 August - The Big Finish audio story Emancipation of the Daleks was recorded remotely.
 * 4 August - Big Finish's Torchwood - Monthly Range audio story The Grey Mare was recorded at Southsea Studios and remotely.
 * 4 August - Big Finish announced the seventh and eighth series of The War Master.
 * 5 August - Big Finish announced The Doctor Chronicles audio anthology Timejacked!.
 * 9 August - Big Finish announced the seventh series of the audio series The Lost Stories, confirming audio adaptations of the original storylines for The Ark in Space and Genesis of the Daleks.
 * 12-13 August - Big Finish's audio adaptation of the unproduced TV story Mind of the Hodiac was recorded at the Soundhouse and remotely.
 * 26-27 August - Big Finish's The War Master audio anthology Escape from Reality was recorded.

September

 * 2 September - Big Finish's Torchwood - Monthly Range audio story Sonny was recorded remotely.
 * 6, 8 and 21-23 September - The Big Finish audio story The Annihilators was recorded at the Soundhouse and Audio Sorcery.
 * 7-10 September - Big Finish's audio anthology Charlotte Pollard: The Further Adventuress was recorded remotely.
 * 9 September (plus additional, unspecified dates) - Big Finish's audio anthology Genesis was recorded.
 * 13 September - Big Finish announced the second series of The Ninth Doctor Adventures.
 * 14 September - Big Finish announced the casting of Ruth Madeley as the Sixth Doctor's companion Hebe Harrison.
 * 15 September - The BBC announced the animated recreation of Galaxy 4.
 * 16 September - The mystery series FindTheDoctor ended.
 * 21-23 September - The Big Finish audio anthology Battlegrounds was recorded at the Soundhouse.
 * 23 September - Big Finish's audiobook anthology Short Trips: Volume 11 was recorded.
 * 24 September - The BBC announced that Russell T Davies will succeed Chris Chibnall as showrunner from 2023 onwards.

October

 * 8 and 12-13 October - Big Finish's audio anthology The Second Doctor: Volume Three was recorded remotely.
 * 8 October - Big Finish's audio anthology Back to Earth was recorded.
 * 9 October - Series 13 was confirmed to launch on 31 October, under the umbrella title Flux.
 * 12 October - Big Finish announced the audio anthology Charlotte Pollard: The Further Adventuress.
 * 14 October - Big Finish's audio anthology Into the Stars was recorded at the Soundhouse.
 * 15 October - Big Finish's audiobook anthology Short Trips: Volume 11 was recorded.
 * 16 October - Big Finish's audio anthology Protectors of Time was recorded at the Soundhouse.
 * 18 October - Big Finish's Torchwood - Monthly Range audio story Infidel Places was recorded at PRL Studios.
 * 22 and 27-29 October - Big Finish's audio anthology Blood & Steel was recorded at the Soundhouse.
 * 25, 27 and 29 October - Big Finish's audio anthology Silver and Ice was recorded at the Soundhouse.
 * 26 October - Big Finish's Torchwood audio story The Black Knight was recorded at the Soundhouse.

November

 * 1-2 and 15 November - Big Finish's audio anthology Purity Undreamed was recorded at the Soundhouse.
 * 5 and 11 November - Big Finish's audio anthology Hidden Depths was recorded at the Soundhouse and remotely.
 * 10 November - Big Finish announced details on the audio anthology Silver and Ice.
 * 11, 17 and 18 November - The Big Finish audio anthology The Outlaws was recorded at the Soundhouse.
 * 11 November - Big Finish's audio anthology Into the Stars was recorded at the Soundhouse.
 * 12 November - Big Finish's Torchwood audio story War Chest was recorded.
 * 15-17 November - Big Finish's UNIT: Brave New World audio anthology Seabird One was recorded at the Soundhouse.
 * 19 November - Big Finish's Short Trips audiobook The Lichyrwick Abomination was recorded at PRL Studios.
 * 23 November - The BBC announced the animated recreation of The Abominable Snowmen.
 * 23 November - Big Finish's audiobook anthology Short Trips: Volume 11 was recorded.
 * 26 November - Big Finish announced the audiobook versions of the Bernice Summerfield novels The Weather on Versimmon and The Slender-Fingered Cats of Bubastis.
 * 29 November - Big Finish's Torchwood One audio anthology Nightmares was recorded at the Soundhouse.
 * 30 November - Big Finish announced the cast and story details for the audio anthology Peladon.

December

 * 5 December - The BBC announced the title for the New Year's Day special as Eve of the Daleks.
 * 6-7 and 16-17 December - Big Finish's Gallifrey: War Room audio anthology Allegiance was recorded.
 * 7 December - Big Finish announced the audio drama The Annihilators.
 * 10 December - Big Finish announced details on The War Doctor Begins audio anthology Battlegrounds.
 * 10 December - Big Finish announced that their licence to produce Doctor Who audio adventures had been extended until at least 2030.
 * 13 December - Big Finish announced the winning entry of that year's Paul Spragg Memorial Short Trip Opportunity, a Ninth Doctor audiobook entitled The Lichyrwick Abomination.
 * 13-14 December - Big Finish's Master! audio anthology Nemesis Express was recorded.
 * 14-17 December - Big Finish's audio anthology Stranded 4 was recorded at PRL Studios.