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On 3月20日, a number of things set in or relevant to the Doctor Who universe were released or published.
- 1965 - "The Centre" was first broadcast on BBC1.
- 1965 - The sixth part of the TV Century 21 comic story Power Play was first published.
- 1971 - Episode two of The Claws of Axos was first broadcast on BBC1.
- 1971 - Part five of Gemini Plan was first published in Countdown.
- 1976 - Part one of the TV Comic story Treasure Trail was first published.
- 1980 - The novelisation of The Stones of Blood was first published by Target Books.
- 1980 - The Making of Doctor Who was reprinted by Target Books.
- 1980 - DWM 24 was released by Marvel Comics.
- 1997 - Lungbarrow and The Dark Path were first published by Virgin Books.
- 2008 - Torchwood Magazine comic story Jetsam was first published.
- 2013 - Prisoners of Time 3 was first published by IDW Publishing.
- 2013 - DWDVDF 110 was first published by GE Fabbri Ltd.
- 2015 - Top Trumps (pack 8) was first released by Winning Moves UK Ltd.
- 2018 - Serpent in the Silver Mask was first released by Big Finish Productions.
- 2019 - Time War: Volume Two was released by Big Finish.