The Doctor Who Production Diary: May 20th

1964 Sydney Newman suggests that Doctor Who should be cancelled if satisfactory studio facilities cannot be found for the programme; it is soon agreed that Riverside Studio 1 will be the show's new production home The First Doctor
1966 Recording for The Savages takes place in Riverside Studios 1 The Savages
1967 Debut broadcast of The Evil Of The Daleks episode one on BBC1 The Evil Of The Daleks
1967 Recording for The Evil Of The Daleks takes place in Lime Grove Studio D; Deborah Watling joins the regular Doctor Who cast The Evil Of The Daleks
1971 Bob Baker and Dave Martin are commissioned to write the first episode of The Mutants The Mutants
1972 Debut broadcast of The Time Monster episode one on BBC1 The Time Monster
1975 Recording for Pyramids Of Mars takes place in BBC Television Centre Studio 3 Pyramids Of Mars
1980 Filming for State Of Decay takes place at the BBC Visual Effects Workshop State Of Decay
1981 Recording for The Visitation takes place in BBC Television Centre Studio 3 The Visitation
1996 Jon Pertwee (the Third Doctor) dies The Third Doctor
2006 Debut broadcast of The Age Of Steel on BBC1 Rise Of The Cybermen / The Age Of Steel
2008 The BBC announces that Steven Moffat will become the new executive producer and showrunner of Doctor Who as of Season Thirty-One The Tenth Doctor
2009 Recording for The End Of Time takes place at Upper Boat Studios The End Of Time
2017 Debut broadcast of Extremis on BBC1 and BBC1 HD Extremis