18 December (releases)


 * 1965 - "Coronas of the Sun" was first broadcast on BBC1.
 * 1965 - Part four of the TV Comic story Shark Bait was first published.
 * 1971 - Part five of The Eternal Present was first published in Countdown.
 * 1976 - Part one of the TV Comic story Dredger was first published.
 * 2003 - Episode six of Scream of the Shalka was first released online.
 * 2003 - Companion Piece was first published by Telos Publishing.
 * 2006 - Time Flies aired on BBC Three.
 * 2008 - The Doctor Who Adventures comic story Frosty the Snowdemon was first published.
 * 2010 - Regeneration was first broadcast on Disney XD.
 * 2012 - Devil in the Smoke was first published by BBC Digital.
 * 2013 - Volume three of Prisoners of Time was released by IDW Publishing.