4 February (production)


 * 1964 - Writer Robert Gould's script for the future Planet of Giants proceeded slowly. On this day, script editor David Whitaker released Gould from that idea, and requested a replacement story — which would also never reach the synopsis stage. (REF: The First Doctor Handbook)
 * 1964 - On the same day, Robert Gould had a story conference with David Whitaker, in which he revealed his idea of plants being at the top of the evolutionary chain, and of "plants treat[ing] people as people treat plants." When his exact idea would used in the script "The Screaming Jungle," Gould would press charges against Whitaker for plagiarising his work.
 * 1985 - Studio production concluded on Revelation of the Daleks, concluding Doctor Who production for the season. The announcement of 27 February would imply that this was the final production session ever. However, production resumed after eighteen months.
 * 2007 - Recording for Big Finish audio story The Judas Gift took place.
 * 2010 - Recording for Big Finish audio story Find and Replace took place.