1981年（制作）

January

8-9 January - Studio filming for Logopolis took place at BBC Television Centre studio 3. (REF: Doctor Who The Handbook: The Fourth Doctor)
22-24 January - Studio filming for Logopolis took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Fourth Doctor)

April - John Nathan-Turner wrote a story outline for the proposed K9 and Company spin-off pilot story.
8 April - Castrovalva is commissioned as a script, with a delivery date of 1 June.^[1]
13-15 and 28-30 April - Studio filming for Four to Doomsday took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Fifth Doctor)

May - John Nathan-Turner and Anthony Root composed a "format document" for a planned spin-off series to be entitled K9 and Company.
1 May - Pre-filming for The Visitation took place at Ealing Studios. (REF: Doctor Who The Handbook: The Fifth Doctor)
5-8 May - Location filming for The Visitation took place at Ealing Studios. (REF: Doctor Who The Handbook: The Fifth Doctor)
12 May - Elisabeth Sladen was officially invited to reprise the role of Sarah Jane Smith for the planned K9 and Company spin-off.
20-21 May - Studio filming for The Visitation took place at BBC Television Centre studio 3. (REF: Doctor Who The Handbook: The Fifth Doctor)

3-5 June - Studio filming for The Visitation took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Fifth Doctor)

29-31 July - Studio filming for Kinda took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Fifth Doctor)

12-14 August - Studio filming for Kinda took place at BBC Television Centre studio 8. (REF: Doctor Who The Handbook: The Fifth Doctor)

1 October - Studio filming for Castrovalva took place at BBC Television Centre 6. (REF: Doctor Who The Handbook: The Fifth Doctor)
5-9 October - Location filming for Black Orchid took place. (REF: Doctor Who The Handbook: The Fifth Doctor)
14 October - Steve Gallagher met with the Doctor Who production team to discuss his new story breakdown for Terminus. There, producer John Nathan-Turner informed him that the serial would be Nyssa's last. Peter Davison, who played the then-current Fifth Doctor, protested against this decision.
20-21 October - Studio filming for Black Orchid took place. (REF: Doctor Who The Handbook: The Fifth Doctor)
29 October - Location filming for Earthshock took place. (REF: Doctor Who The Handbook: The Fifth Doctor)

November - Production of the pilot episode of the planned K9 and Company spin-off series, A Girl's Best Friend, took place.
10-12 and 24-26 November - Studio filming for Earthshock took place. (REF: Doctor Who The Handbook: The Fifth Doctor)
10 November - Studio filming for additional scenes for Kinda took place at BBC Television Centre studio 8. (REF: Doctor Who The Handbook: The Fifth Doctor)