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On 3 April, a number of things set in or relevant to the Doctor Who universe were released or published.
- 1965 - "The Knight of Jaffa" was first broadcast on BBC1.
- 1965 - Part one of Duel of the Daleks was first published in TV Century 21.
- 1971 - Episode four of The Claws of Axos was first broadcast on BBC1.
- 1971 - Part two of the Timebenders was first published in Countdown.
- 1976 - Part three of the TV Comic story Treasure Trail was first published.
- 1977 - Whose Doctor Who, the first documentary about the programme, was first broadcast on BBC Two.
- 1980 - DWM 26 was released by Marvel Comics.
- 1995 - The Ribos Operation and The Pirate Planet were released on VHS.
- 2000 - Coldheart and Verdigris were first published by BBC Books.
- 2003 - DWM 329 was first released by Panini Comics.
- 2004 - The Feast of the Stone was released online.
- 2008 - DWA 58 was first released by BBC Magazines.
- 2008 - DWM 394 was first released by Panini.
- 2010 - The Eleventh Hour was first broadcast on BBC One. Later, Call Me the Doctor aired on BBC Three.
- 2010 - K9 Regeneration debuted in full on Disney XD in the UK and in Australia on Ten.
- 2012 - The DVD box set Torchwood: Miracle Day was first released in Region 1.
- 2013 - DWDVDF 111 was first published by GE Fabbri Ltd.
- 2014 - A Handful of Stardust was first published by BBC Digital.
- 2014 - Jago & Litefoot: Series Seven was first released by Big Finish.
- 2014 - DWM 472 was first released by Panini.
- 2015 - Happy Easter from the Doctor! was released online.
- 2015 - Toby Hadoke's Who's Round 114 was released online.
- 2017 - Part five of Ghost Stories was first published by Titan Comics.
- 2019 - The audiobook version of Bernice Summerfield and the Gods of the Underworld was first released by Big Finish.
- 2020 - Doctor Who - Series 12 was first released by Silva Screen Records.
- 2020 - The Raggedy Doctor by Amelia Pond was released online.
- 2024 - Morbius Part 1 was first released by Big Finish.