11 April (releases)


 * 1964 - "The Sea of Death", the first episode of The Keys of Marinus, was first broadcast on BBC tv.
 * 1970 - Episode four of The Ambassadors of Death was first broadcast on BBC1.
 * 1970 - Part two of the TV Comic story Insect was first published.
 * 1994 - The CD The Worlds of Doctor Who was first released by Silva Screen.
 * 2009 - Planet of the Dead was first broadcast on BBC One. Later, Desert Storm aired on BBC Three.
 * 2013 - The Doctor Who Adventure comic story The Planet That Went Backwards was first published.
 * 2014 - Moonflesh and The Evil One were first released by Big Finish.
 * 2017 - The Helm of Awe was first released by Big Finish.