April (production)

* 1976 - Location filming for The Masque of Mandragora took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
*1977 - Bray filming for The Invisible Enemy took place. (REF: Doctor Who The Handbook: The Fourth Doctor)
*1995 - Jon Pertwee filmed his regeneration scene as a cameo for the fan film Devious. It was his last performance as the Third Doctor.http://www.warpedfactor.com/2015/07/1995-jon-pertwees-last-appearance-as.html
* 2005 - At some point before the 28th, Tom MacRae was invited to write a Cyberman two-parter for Doctor Who series 2. (DWMSE 14)
== Footnotes ==