15 March (production)

* 1966 - Pat Dunlop leaves working on The War Machines after partly completing a script for the first episode, due to the script work clashing with pre-existing work he had ongoing on another TV show. Ian Stuart Black takes over the writing duties for this story.REF: Doctor Who The Handbook: The First Doctor
*1967 - Model filming for The Faceless Ones began on Stage 3 of Ealing Studios. (TCH 10)
* 1973 - Location filming for The Green Death took place. (REF: Doctor Who The Handbook: The Third Doctor)
* 1974 - Location filming for Planet of the Spiders took place. (REF: Doctor Who The Handbook: The Third Doctor)
* 1983 - Location filming for The Five Doctors took place. (REF: Doctor Who The Handbook: The Fifth Doctor)
* 2006 - The final edit and dub for Tooth and Claw was prepared. (DWMSE 14)
* 2018 - Big Finish announced the first series of Lady Christina.
* 2019 - Big Finish's audio anthology The Eighth Doctor: Time War: Volume Three was recorded.
* 2023 - The Big Finish audio story Intelligence for War was recorded at Audio Sorcery.