3 June (production)


 * 1969 - Robert Holmes was commissioned by Terrance Dicks to write a full script for the serial then known as Facsimile. The serial was, by mid-September, renamed Spearhead from Space.
 * 2007 - Recording for The Catalyst took place at The Moat Studios.
 * 2008 - Recording for The Mists of Time took place at The Moat Studios.