21 August (releases)

* 1965 - Part seven of the TV Century 21 comic story The Penta Ray Factor was first published.
* 1971 - Part five of The Celluloid Midas was first published in Countdown.
* 1975 - The novelisation of Green Death was first published by Target Books.
* 1976 - Part two of the TV Comic story Mind Snatch was first published.
* 1980 - The novelisations of The Keys of Marinus and of The Nightmare of Eden were first published by Target Books.
* 1997 - Ship of Fools was first published by Virgin Books.
* 2003 - DWM 334 was first released by Panini Comics.
* 2008 - DWM 399 was first released by Panini Comics.
* 2013 - DWDVDF 121 was first published by GE Fabbri Ltd.
* 2014 - DWM 477 was first released by Panini Comics.
* 2015 - Toby Hadoke's Who's Round 134 was released online.
* 2018 - The first two volumes of Class: The Audio Adventures were released by Big Finish Productions.
* 2019 - The Torchwood audio story The Hope was released by Big Finish.