23 April (releases)


 * 1966 - "The Final Test" was first broadcast on BBC1.
 * 1966 - Part two of TV Comic story The Trodos Tyranny was first published.
 * 2005 - World War Three was first broadcast on BBC One. Later, Why on Earth? aired on BBC Three.
 * 2009 - Issue fifteen of Torchwood Magazine, including part one of comic story Broken, was first published by Titan Magazines.
 * 2011 - The Impossible Astronaut was broadcast on BBC One. Later, Coming to America aired on BBC Three.