20 April (releases)
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On 20 April, a number of things set in or relevant to the Doctor Who universe were released or published.
- 1968
- Episode six of Fury from the Deep premiered on BBC1.
- Part four of the TV Comic story The Cyber Empire was published.
- 1972 - The Making of Doctor Who was published by Piccolo Books.
- 1974
- Episode five of The Monster of Peladon premiered on BBC1.
- Part seven of the TV Comic story Is Anyone There? was published.
- 1978 - Doctor Who Discovers: Strange and Mysterious Creatures was published by Target Books.
- 1989 - The novelisation of Attack of the Cybermen was published by Target Books.
- 1995 - Sanctuary was published by Virgin Books.
- 2006 - TDW 2 premiered on BBC One.
- 2007 - TDW 16, including episode three of The Infinite Quest, premiered on CBBC.
- 2011
- AFL 1 was published by IDW Publishing.
- DWDVDF 60 was published by GE Fabbri Ltd.
- 2013
- Hide premiered on BBC One.
- The second edition of The Nth Doctor was published by iUniverse.
- 2016
- The Eleventh Doctor Year Two #8 and The Fourth Doctor #2 were published by Titan Comics.
- TCH 67 was published by Hachette Partworks.
- 2017
- The Shining Man, Diamond Dogs and Plague City were published by BBC Books.
- Dethras was released by Big Finish Productions.
- DWMSE 46 was published by Panini Comics.
- DWFC 96 was published by Eaglemoss Collections.
- 2022
- The Torchwood One audio anthology Nightmares was released by Big Finish.
- The Doctors React to 'Legend of the Sea Devils' was released on the Doctor Who Twitter account.
- 2023
- Beyond Bannerman Road was released by Big Finish.
- The Amazing World of Doctor Who was released by BBC Audio.
