The Doctor Who Production Diary: April 23rd

1965 Recording for The Space Museum takes place in BBC Television Centre Studio 4 in White City, London The Space Museum
1965 Robert Holmes meets with Donald Tosh regarding a story idea that will ultimately become The Krotons The Krotons
1966 Debut broadcast of The Celestial Toymaker episode four, The Final Test, on BBC One; in response to the complaints from Frank Richards' representatives, a continuity announcement airs to emphasise that Cyril is not intended to be Billy Bunter The Celestial Toymaker
1971 Recording for The Daemons takes place in Ramsbury, Wiltshire The Daemons
1975 Death of William Hartnell (bio), the original actor to play the First Doctor
1975 Recording for Terror Of The Zygons takes place at BBC Television Centre Studio 4 in White City, London Terror Of The Zygons
1978 Recording for The Ribos Operation takes place at BBC Television Centre Studio 4 in White City, London The Ribos Operation
1979 Recording for The Creature From The Pit takes place at BBC Television Centre Studio 6 in White City, London The Creature From The Pit
1981 Lesley Elizabeth Thomas is commissioned to provide a storyline for “Way Down Yonder”, which was intended to feature location filming in the southern United States The Fifth Doctor
1982 Bill Lyons is commissioned to write one or more episodes of “Parasites” The Fifth Doctor
2005 Debut broadcast of World War Three on BBC One Aliens Of London / World War Three
2008 Recording for The Next Doctor takes place in Gloucester, Gloucestershire The Next Doctor
2009 Recording for The End Of Time takes place at Upper Boat Studios in Upper Boat, Wales The End Of Time
2011 Debut broadcast of The Impossible Astronaut on BBC One and BBC One HD The Impossible Astronaut / Day Of The Moon
2012 Recording for Asylum Of The Daleks takes place at Roath Lock Studios in Cardiff, Wales Asylum Of The Daleks
2012 Recording for The Angels Take Manhattan takes place at Roath Lock Studios in Cardiff, Wales The Angels Take Manhattan
2013 Recording for The Day Of The Doctor takes place at Roath Lock Studios in Cardiff, Wales The Day Of The Doctor
2015 Recording for The Girl Who Died takes place in Penarth, Wales The Girl Who Died
2016 During the broadcast of a special mini-episode called Friend From The Future, the BBC announces that Pearl Mackie will play new companion Bill Bill