23 April (releases)


 * 1966 - "The Final Test" was first broadcast on BBC1.
 * 1966 - Part two of the TV Comic story The Trodos Tyranny was first published.
 * 1977 - Part six of the TV Comic story The Fire Feeders was first published.
 * 2001 - The novel The Squire's Crystal was published by Big Finish Productions.


 * 2001 - The audio story Minuet in Hell was first published by Big Finish Productions.
 * 2005 - World War Three was first broadcast on BBC One. Later, Why on Earth? aired on BBC Three.
 * 2009 - Part one of the Torchwood Magazine comic story Broken was first published.
 * 2009 - The Doctor Who Adventures comic story The Crystal Palace was first published.
 * 2011 - The Impossible Astronaut was broadcast on BBC One. Later, Coming to America aired on BBC Three and Doctor Who: Rewind on BBC America.
 * 2011 - My Sarah Jane: A Tribute to Elisabeth Sladen aired on BBC Three.
 * 2014 - The Doctor Who Adventures comic story Thrill-Seeker was first published.
 * 2016 - Friend from the Future premiered during a football match's half time.