The Doctor Who Production Diary: 1975

January
4 Debut broadcast of Robot episode two on BBC1 Robot
6 Location filming for Genesis Of The Daleks takes place in Bletchworth, Surrey Genesis Of The Daleks
7 Location filming for Genesis Of The Daleks takes place in Bletchworth, Surrey Genesis Of The Daleks
8 Location filming for Genesis Of The Daleks takes place in Bletchworth, Surrey Genesis Of The Daleks
9 Location filming for Genesis Of The Daleks takes place in Bletchworth, Surrey Genesis Of The Daleks
10 Location filming for Genesis Of The Daleks takes place in Bletchworth, Surrey Genesis Of The Daleks
11 Debut broadcast of Robot episode three on BBC1 Robot
13 Filming for Genesis Of The Daleks takes place at the Ealing Television Film Studios Genesis Of The Daleks
14 Filming for Genesis Of The Daleks takes place at the Ealing Television Film Studios Genesis Of The Daleks
16 Filming for Genesis Of The Daleks takes place at Bura & Hardwick Genesis Of The Daleks
18 Debut broadcast of Robot episode four on BBC1 Robot
21 Barry Letts is commissioned to provide a storyline for “The Prisoner Of Time” The Fourth Doctor
25 Debut broadcast of The Ark In Space episode one on BBC1 The Ark In Space
27 Recording for Genesis Of The Daleks takes place in BBC Television Centre Studio 1 Genesis Of The Daleks
28 Recording for Genesis Of The Daleks takes place in BBC Television Centre Studio 1 Genesis Of The Daleks
31 Dennis Spooner is commissioned to provide a storyline for “Nightmare Planet” The Fourth Doctor

February
1 Debut broadcast of The Ark In Space episode two on BBC1 The Ark In Space
4 Dennis Spooner is commissioned to write “Nightmare Planet” The Fourth Doctor
8 Debut broadcast of The Ark In Space episode three on BBC1 The Ark In Space
10 Recording for Genesis Of The Daleks takes place in BBC Television Centre Studio 8 Genesis Of The Daleks
10 Recording for Revenge Of The Cybermen takes place in BBC Television Centre Studio 8 Revenge Of The Cybermen
11 Margaret Thatcher becomes leader of the Conservative Party, and the first female leader of a British political party
11 Recording for Genesis Of The Daleks takes place in BBC Television Centre Studio 8 Genesis Of The Daleks
13 Terry Nation is commissioned to provide a storyline for “Return To Sukannan” The Fourth Doctor
15 Debut broadcast of The Ark In Space episode four on BBC1 The Ark In Space
22 Debut broadcast of The Sontaran Experiment episode one on BBC1 The Sontaran Experiment
24 Recording for Genesis Of The Daleks takes place in BBC Television Centre Studio 6 Genesis Of The Daleks
25 Recording for Genesis Of The Daleks takes place in BBC Television Centre Studio 6 Genesis Of The Daleks
27 Terry Nation is commissioned to write The Android Invasion The Android Invasion

March
1 Debut broadcast of The Sontaran Experiment episode two on BBC1 The Sontaran Experiment
7 A series of problems leads Robert Holmes to inform Lewis Greifer his scripts for Pyramids Of Mars are being abandoned, with Holmes writing a completely new version of the story; the credit will ultimately be attributed to the pseudonymous “Stephen Harris” Pyramids Of Mars
8 Debut broadcast of Genesis Of The Daleks episode one on BBC1 Genesis Of The Daleks
15 Debut broadcast of Genesis Of The Daleks episode two on BBC1 Genesis Of The Daleks
17 Location filming for Terror Of The Zygons takes place in Climping, West Sussex and South Ambersham, West Sussex Terror Of The Zygons
18 Location filming for Terror Of The Zygons takes place in South Ambersham, West Sussex and Storrington, West Sussex Terror Of The Zygons
19 Location filming for Terror Of The Zygons takes place in South Ambersham, West Sussex Terror Of The Zygons
20 Location filming for Terror Of The Zygons takes place in Charlton, West Sussex Terror Of The Zygons
21 Tom Baker is contracted for Season Thirteen The Fourth Doctor
21 Location filming for Terror Of The Zygons takes place in Crabtree, West Sussex Terror Of The Zygons
22 Debut broadcast of Genesis Of The Daleks episode three on BBC1 Genesis Of The Daleks
24 Location filming for Terror Of The Zygons takes place in Storrington, West Sussex Terror Of The Zygons
25 Elisabeth Sladen is contracted for the final twenty-two episodes of Season Thirteen Sarah Jane
Smith
25 Location filming for Terror Of The Zygons takes place in South Ambersham, West Sussex Terror Of The Zygons
26 Location filming for Terror Of The Zygons takes place in London Terror Of The Zygons
29 Debut broadcast of Genesis Of The Daleks episode four on BBC1 Genesis Of The Daleks

April
4 Bill Gates and Paul Allen found Microsoft
5 Debut broadcast of Genesis Of The Daleks episode five on BBC1 Genesis Of The Daleks
7 Recording for Terror Of The Zygons takes place in BBC Television Centre Studio 3 Terror Of The Zygons
8 Recording for Terror Of The Zygons takes place in BBC Television Centre Studio 3 Terror Of The Zygons
12 Debut broadcast of Genesis Of The Daleks episode six on BBC1 Genesis Of The Daleks
19 Debut broadcast of Revenge Of The Cybermen episode one on BBC1 Revenge Of The Cybermen
22 Recording for Terror Of The Zygons takes place in BBC Television Centre Studio 4 Terror Of The Zygons
23 Recording for Terror Of The Zygons takes place in BBC Television Centre Studio 4; this is Ian Marter's last day as a regular member of the Doctor Who cast Terror Of The Zygons
24 William Hartnell (the First Doctor) dies The First Doctor
26 Debut broadcast of Revenge Of The Cybermen episode two on BBC1 Revenge Of The Cybermen
29 Location filming for Pyramids Of Mars takes place in East End, Hampshire Pyramids Of Mars
30 Saigon falls as the Vietnam War ends in victory for the Communist forces
30 Location filming for Pyramids Of Mars takes place in East End, Hampshire Pyramids Of Mars

May
1 Terrance Dicks is commissioned to provide a storyline for The Brain Of Morbius The Brain Of Morbius
1 Location filming for Pyramids Of Mars takes place in East End, Hampshire Pyramids Of Mars
2 Location filming for Pyramids Of Mars takes place in East End, Hampshire Pyramids Of Mars
3 Debut broadcast of Revenge Of The Cybermen episode three on BBC1 Revenge Of The Cybermen
7 Filming for Pyramids Of Mars takes place at the BBC Television Centre Puppet Theatre Pyramids Of Mars
8 Filming for Pyramids Of Mars takes place at the BBC Television Centre Puppet Theatre Pyramids Of Mars
9 Filming for Pyramids Of Mars takes place at the BBC Television Centre Puppet Theatre Pyramids Of Mars
10 Debut broadcast of Revenge Of The Cybermen episode four on BBC1 Revenge Of The Cybermen
13 A storyline called “The Beasts Of Manzic” by Robin Smyth is rejected The Fourth Doctor
13 Terrance Dicks' “The Haunting” is abandoned, although Dicks would later reuse elements in State Of Decay The Fourth Doctor
16 Brian Hayles submits a storyline entitled “The Eyes Of Nemesis” The Fourth Doctor
19 Louis Marks receives staff clearance to write Planet Of Evil Planet Of Evil
19 Recording for Pyramids Of Mars takes place in BBC Television Centre Studio 3 Pyramids Of Mars
20 Recording for Pyramids Of Mars takes place in BBC Television Centre Studio 3 Pyramids Of Mars
29 Bob Baker and Dave Martin submit a story idea that will become The Hand Of Fear The Hand Of Fear

June
2 Recording for Pyramids Of Mars takes place in BBC Television Centre Studio 6 Pyramids Of Mars
3 Recording for Pyramids Of Mars takes place in BBC Television Centre Studio 6 Pyramids Of Mars
6 Terrance Dicks is commissioned to write The Brain Of Morbius The Brain Of Morbius
11 Filming for Planet Of Evil takes place at the Ealing Television Film Studios Planet Of Evil
12 Filming for Planet Of Evil takes place at the Ealing Television Film Studios Planet Of Evil
13 Filming for Planet Of Evil takes place at the Ealing Television Film Studios Planet Of Evil
14 Filming for Planet Of Evil takes place at the Ealing Television Film Studios Planet Of Evil
20 Bob Baker and Dave Martin are commissioned to write The Hand Of Fear The Hand Of Fear
30 Recording for Planet Of Evil takes place in BBC Television Centre Studio 6 Planet Of Evil

July
early
Jul
It is learned that Nicholas Courtney will be unable to appear in The Android Invasion as hoped due to prior commitments Brigadier Alistair Gordon Lethbridge-Stewart
1 Recording for Planet Of Evil takes place in BBC Television Centre Studio 6 Planet Of Evil
14 Recording for Planet Of Evil takes place in BBC Television Centre Studio 3 Planet Of Evil
15 Recording for Planet Of Evil takes place in BBC Television Centre Studio 3 Planet Of Evil
21 Location filming for The Android Invasion takes place in Harwell, Oxfordshire The Android Invasion
22 Location filming for The Android Invasion takes place in Tubney, Oxfordshire and Witney, Oxfordshire The Android Invasion
23 Location filming for The Android Invasion takes place in Tubney, Oxfordshire The Android Invasion
24 Location filming for The Android Invasion takes place in East Hagbourne, Oxfordshire The Android Invasion
25 Location filming for The Android Invasion takes place in East Hagbourne, Oxfordshire The Android Invasion

August
11 Recording for The Android Invasion takes place in BBC Television Centre Studio 3 The Android Invasion
11 Eric Pringle is commissioned to write the first two episodes of “The Angarath” The Fourth Doctor
12 Recording for The Android Invasion takes place in BBC Television Centre Studio 3 The Android Invasion
19 Chris Boucher is commissioned to provide a storyline for The Face Of Evil The Face Of Evil
25 Recording for The Android Invasion takes place in BBC Television Centre Studio 8 The Android Invasion
26 Recording for The Android Invasion takes place in BBC Television Centre Studio 8 The Android Invasion
30 Debut broadcast of Terror Of The Zygons episode one on BBC1 Terror Of The Zygons

September
6 Debut broadcast of Terror Of The Zygons episode two on BBC1 Terror Of The Zygons
13 Debut broadcast of Terror Of The Zygons episode three on BBC1 Terror Of The Zygons
20 Debut broadcast of Terror Of The Zygons episode four on BBC1 Terror Of The Zygons
22 Unhappy with the rewrites that Robert Holmes has performed on his scripts for The Brain Of Morbius, Terrance Dicks asks that they be credited to a pseudonym -- ultimately “Robin Bland” The Brain Of Morbius
27 Debut broadcast of Planet Of Evil episode one on BBC1 Planet Of Evil
30 Robert Sloman is commissioned to write The Seeds Of Doom The Seeds Of Doom

October
4 Debut broadcast of Planet Of Evil episode two on BBC1 Planet Of Evil
6 Recording for The Brain Of Morbius takes place in BBC Television Centre Studio 1 The Brain Of Morbius
7 Recording for The Brain Of Morbius takes place in BBC Television Centre Studio 1 The Brain Of Morbius
11 Debut broadcast of Planet Of Evil episode three on BBC1 Planet Of Evil
14 The Hand Of Fear, originally intended to close Season Thirteen, is pushed back to Season Fourteen to allow time to heavily revise the storyline The Hand Of Fear
18 Debut broadcast of Planet Of Evil episode four on BBC1 Planet Of Evil
20 Recording for The Brain Of Morbius takes place in BBC Television Centre Studio 3 The Brain Of Morbius
21 Recording for The Brain Of Morbius takes place in BBC Television Centre Studio 3 The Brain Of Morbius
24 A remount of part of the October 21st recording for The Brain Of Morbius takes place at BBC Television Centre (studio unknown) The Brain Of Morbius
25 Debut broadcast of Pyramids Of Mars episode one on BBC1 Pyramids Of Mars
30 Location filming for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom
30 A storyline entitled “The Mentor Conspiracy” by Chris Boucher is rejected The Fourth Doctor
31 Location filming for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom

November
1 Debut broadcast of Pyramids Of Mars episode two on BBC1 Pyramids Of Mars
1 Location filming for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom
2 Location filming for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom
3 Location filming for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom
6 Filming for The Seeds Of Doom takes place at the Ealing Television Film Studios The Seeds Of Doom
8 Debut broadcast of Pyramids Of Mars episode three on BBC1 Pyramids Of Mars
15 The United Kingdom, the United States, France, West Germany, Italy and Japan form the “Group of 6” industralised nations; Canada joins the following year to create the G7
15 Debut broadcast of Pyramids Of Mars episode four on BBC1 Pyramids Of Mars
17 Recording for The Seeds Of Doom takes place in BBC Television Centre Studio 4 The Seeds Of Doom
18 Recording for The Seeds Of Doom takes place in BBC Television Centre Studio 4 The Seeds Of Doom
22 Debut broadcast of The Android Invasion episode one on BBC1 The Android Invasion
29 Debut broadcast of The Android Invasion episode two on BBC1 The Android Invasion

December
1 Recording for The Seeds Of Doom takes place in BBC Television Centre Studio 4 The Seeds Of Doom
2 Recording for The Seeds Of Doom takes place in BBC Television Centre Studio 4 The Seeds Of Doom
6 Noel Clarke (Mickey Smith) is born Mickey Smith
6 Debut broadcast of The Android Invasion episode three on BBC1 The Android Invasion
7 Location filming for The Seeds Of Doom takes place in Buckland, Surrey and Betchworth, Surrey The Seeds Of Doom
8 Location filming for The Seeds Of Doom takes place in Buckland, Surrey The Seeds Of Doom
12 Debut broadcast of The Android Invasion episode four on BBC1 The Android Invasion
15 Recording for The Seeds Of Doom takes place in BBC Television Centre Studio 8 The Seeds Of Doom
15 A script called “Fires Of The Starmind” by Marc Platt is rejected The Fourth Doctor
16 Recording for The Seeds Of Doom takes place in BBC Television Centre Studio 8 The Seeds Of Doom
19 Recording for The Seeds Of Doom takes place in BBC Television Centre Studio 4 The Seeds Of Doom
late
Dec
Elisabeth Sladen informs Philip Hinchcliffe that she will leave Doctor Who during Season Fourteen Sarah Jane
Smith