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.
- 1995 - The Ribos Operation and The Pirate Planet were released on VHS.
- 2000 - Coldheart and Verdigris were first published by BBC Books.
- 2008 - Part one of the Doctor Who Adventures comic story The Poison Planet was first published.
- 2010 - The Eleventh Hour was first broadcast on BBC One. Later, Call Me the Doctor aired on BBC Three and The Ultimate Guide on BBC America. 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.
- 2017 - Part five of Ghost Stories was first published by Titan Comics.