The Doctor Who Production Diary: 1975

January
4 Debut broadcast of Robot episode two on BBC One Robot
6 Recording for Genesis Of The Daleks takes place in Betchworth, Surrey Genesis Of The Daleks
7 Recording for Genesis Of The Daleks takes place in Betchworth, Surrey Genesis Of The Daleks
8 Recording for Genesis Of The Daleks takes place in Betchworth, Surrey Genesis Of The Daleks
9 Recording for Genesis Of The Daleks takes place in Betchworth, Surrey Genesis Of The Daleks
11 Debut broadcast of Robot episode three on BBC One Robot
13 Recording for Genesis Of The Daleks takes place at the BBC Television Film Studios in Ealing, London Genesis Of The Daleks
14 Recording for Genesis Of The Daleks takes place at the BBC Television Film Studios in Ealing, London Genesis Of The Daleks
16 Recording for Genesis Of The Daleks takes place at the premises of Bob Bura and John Hardwick in Crouch End, London Genesis Of The Daleks
18 Debut broadcast of Robot episode four on BBC One 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 BBC One The Ark In Space
27 Recording for Genesis Of The Daleks takes place at BBC Television Centre Studio 1 in White City, London Genesis Of The Daleks
28 Recording for Genesis Of The Daleks takes place at BBC Television Centre Studio 1 in White City, London 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 BBC One The Ark In Space
3 Birth of Mat King (bio), director
4 Dennis Spooner is commissioned to write “Nightmare Planet” The Fourth Doctor
8 Debut broadcast of The Ark In Space episode three on BBC One The Ark In Space
10 Recording for Genesis Of The Daleks takes place at BBC Television Centre Studio 8 in White City, London Genesis Of The Daleks
10 Recording for Revenge Of The Cybermen takes place at BBC Television Centre Studio 8 in White City, London 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 at BBC Television Centre Studio 8 in White City, London Genesis Of The Daleks
13 Terry Nation is commissioned to provide a storyline for “Return To Suknan” The Fourth Doctor
15 Debut broadcast of The Ark In Space episode four on BBC One The Ark In Space
22 Death of Peter R Newman (bio), writer
22 Debut broadcast of The Sontaran Experiment episode one on BBC One The Sontaran Experiment
24 Recording for Genesis Of The Daleks takes place at BBC Television Centre Studio 6 in White City, London Genesis Of The Daleks
25 Recording for Genesis Of The Daleks takes place at BBC Television Centre Studio 6 in White City, London 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 BBC One The Sontaran Experiment
7 A series of problems leads Robert Holmes to inform Lewis Greifer that 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 BBC One Genesis Of The Daleks
15 Debut broadcast of Genesis Of The Daleks episode two on BBC One Genesis Of The Daleks
17 Recording for Terror Of The Zygons takes place in West Sussex, at Climping and South Ambersham Terror Of The Zygons
18 Recording for Terror Of The Zygons takes place in West Sussex, at Storrington and South Ambersham Terror Of The Zygons
19 Recording for Terror Of The Zygons takes place in South Ambersham, West Sussex Terror Of The Zygons
20 Recording for Terror Of The Zygons takes place in West Sussex, at Charlton and Chichester Terror Of The Zygons
21 Tom Baker is contracted for Season Thirteen The Fourth Doctor
21 Recording 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 BBC One Genesis Of The Daleks
24 Recording for Terror Of The Zygons takes place in Storrington, West Sussex Terror Of The Zygons
25 Elisabeth Sladen is contracted for Season Thirteen Sarah Jane
Smith
25 Recording for Terror Of The Zygons takes place in South Ambersham, West Sussex Terror Of The Zygons
26 Recording for Terror Of The Zygons takes place in London, probably at Millbank Terror Of The Zygons
29 Debut broadcast of Genesis Of The Daleks episode four on BBC One Genesis Of The Daleks

April
4 Bill Gates and Paul Allen found Microsoft
5 Debut broadcast of Genesis Of The Daleks episode five on BBC One Genesis Of The Daleks
7 Recording for Terror Of The Zygons takes place at BBC Television Centre Studio 3 in White City, London Terror Of The Zygons
8 Recording for Terror Of The Zygons takes place at BBC Television Centre Studio 3 in White City, London Terror Of The Zygons
12 Debut broadcast of Genesis Of The Daleks episode six on BBC One Genesis Of The Daleks
17 The Cambodian Civil War ends with the Khmer Rouge's capture of Phnom Penh, birthing a dictatorship under Pol Pot
19 Debut broadcast of Revenge Of The Cybermen episode one on BBC One Revenge Of The Cybermen
22 Recording for Terror Of The Zygons takes place at BBC Television Centre Studio 4 in White City, London Terror Of The Zygons
23 Death of William Hartnell (bio), the original actor to play the First Doctor
23 Recording for Terror Of The Zygons takes place at BBC Television Centre Studio 4 in White City, London Terror Of The Zygons
26 Debut broadcast of Revenge Of The Cybermen episode two on BBC One Revenge Of The Cybermen
29 Recording 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 Recording for Pyramids Of Mars takes place in East End, Hampshire Pyramids Of Mars

May
1 Recording for Pyramids Of Mars takes place in East End, Hampshire Pyramids Of Mars
1 Terrance Dicks is commissioned to provide a storyline for The Brain Of Morbius The Brain Of Morbius
2 Recording for Pyramids Of Mars takes place in East End, Hampshire Pyramids Of Mars
3 Debut broadcast of Revenge Of The Cybermen episode three on BBC One Revenge Of The Cybermen
7 Recording for Pyramids Of Mars takes place at the BBC Television Centre Puppet Theatre in White City, London Pyramids Of Mars
8 Recording for Pyramids Of Mars takes place at the BBC Television Centre Puppet Theatre in White City, London Pyramids Of Mars
9 Recording for Pyramids Of Mars takes place at the BBC Television Centre Puppet Theatre in White City, London Pyramids Of Mars
10 Debut broadcast of Revenge Of The Cybermen episode four on BBC One 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 at BBC Television Centre Studio 3 in White City, London Pyramids Of Mars
20 Recording for Pyramids Of Mars takes place at BBC Television Centre Studio 3 in White City, London Pyramids Of Mars
22 Recording for Pyramids Of Mars takes place at the BBC Television Centre Puppet Theatre in White City, London Pyramids Of Mars
23 Recording for Pyramids Of Mars takes place at the BBC Television Centre Puppet Theatre in White City, London 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 at BBC Television Centre Studio 6 in White City, London Pyramids Of Mars
3 Recording for Pyramids Of Mars takes place at BBC Television Centre Studio 6 in White City, London Pyramids Of Mars
6 Terrance Dicks is commissioned to write The Brain Of Morbius The Brain Of Morbius
11 Recording for Planet Of Evil takes place at the BBC Television Film Studios in Ealing, London Planet Of Evil
12 Recording for Planet Of Evil takes place at the BBC Television Film Studios in Ealing, London Planet Of Evil
13 Recording for Planet Of Evil takes place at the BBC Television Film Studios in Ealing, London Planet Of Evil
17 Recording for Planet Of Evil takes place at the BBC Television Film Studios in Ealing, London Planet Of Evil
20 Steven Spielberg's Jaws, often considered to be the first blockbuster movie, is released in theatres
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 at BBC Television Centre Studio 6 in White City, London 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 at BBC Television Centre Studio 6 in White City, London Planet Of Evil
14 Recording for Planet Of Evil takes place at BBC Television Centre Studio 3 in White City, London Planet Of Evil
15 Recording for Planet Of Evil takes place at BBC Television Centre Studio 3 in White City, London Planet Of Evil
21 Recording for The Android Invasion takes place in Harwell, Oxfordshire The Android Invasion
22 Recording for The Android Invasion takes place in Oxfordshire, at Witney and Tubney The Android Invasion
23 Recording for The Android Invasion takes place in Tubney, Oxfordshire The Android Invasion
24 Recording for The Android Invasion takes place in Oxfordshire, at Tubney and East Hagbourne The Android Invasion
25 Recording for The Android Invasion takes place in East Hagbourne, Oxfordshire The Android Invasion
30 Union leader Jimmy Hoffa, former president of the International Brotherhood of Teamsters, is reported missing in Detroit and is never seen again

August
11 Recording for The Android Invasion takes place at BBC Television Centre Studio 3 in White City, London 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 at BBC Television Centre Studio 3 in White City, London The Android Invasion
19 Chris Boucher is commissioned to provide a storyline for “Prime Directive” The Face Of Evil
25 Recording for The Android Invasion takes place at BBC Television Centre Studio 8 in White City, London The Android Invasion
26 Recording for The Android Invasion takes place at BBC Television Centre Studio 8 in White City, London The Android Invasion
30 Debut broadcast of Terror Of The Zygons episode one on BBC One Terror Of The Zygons

September
4 Birth of Kai Owen (bio), who played Rhys Williams
6 Debut broadcast of Terror Of The Zygons episode two on BBC One Terror Of The Zygons
13 Debut broadcast of Terror Of The Zygons episode three on BBC One Terror Of The Zygons
20 Debut broadcast of Terror Of The Zygons episode four on BBC One 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 BBC One Planet Of Evil
30 Robert Banks Stewart is commissioned to write The Seeds Of Doom The Seeds Of Doom

October
4 Debut broadcast of Planet Of Evil episode two on BBC One Planet Of Evil
6 Recording for The Brain Of Morbius takes place at BBC Television Centre Studio 1 in White City, London The Brain Of Morbius
7 Recording for The Brain Of Morbius takes place at BBC Television Centre Studio 1 in White City, London The Brain Of Morbius
11 Debut broadcast of Planet Of Evil episode three on BBC One Planet Of Evil
14 The Hand Of Fear, originally intended to close Season Thirteen, is officially pushed back to Season Fourteen to allow time for substantial revision The Hand Of Fear
18 Debut broadcast of Planet Of Evil episode four on BBC One Planet Of Evil
20 Recording for The Brain Of Morbius takes place at BBC Television Centre Studio 3 in White City, London The Brain Of Morbius
21 Recording for The Brain Of Morbius takes place at BBC Television Centre Studio 3 in White City, London 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) in White City, London The Brain Of Morbius
25 Debut broadcast of Pyramids Of Mars episode one on BBC One Pyramids Of Mars
30 Recording for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom
30 Chris Boucher's “Prime Directive” -- now retitled “The Mentor Conspiracy” -- is rejected, but he continues to develop it into what will ultimately become The Face Of Evil The Face Of Evil
31 Recording 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 BBC One Pyramids Of Mars
1 Recording for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom
2 Recording for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom
3 Recording for The Seeds Of Doom takes place in Athelhampton, Dorset The Seeds Of Doom
6 Recording for The Seeds Of Doom takes place at the BBC Television Film Studios in Ealing, London The Seeds Of Doom
8 Debut broadcast of Pyramids Of Mars episode three on BBC One 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 BBC One Pyramids Of Mars
17 Recording for The Seeds Of Doom takes place at BBC Television Centre Studio 4 in White City, London The Seeds Of Doom
18 Recording for The Seeds Of Doom takes place at BBC Television Centre Studio 4 in White City, London The Seeds Of Doom
20 In Spain, Francisco Franco's thirty-six-year rule ends with the dictator's death
22 Debut broadcast of The Android Invasion episode one on BBC One The Android Invasion
29 Debut broadcast of The Android Invasion episode two on BBC One The Android Invasion

December
1 Recording for The Seeds Of Doom takes place at BBC Television Centre Studio 4 in White City, London The Seeds Of Doom
2 Recording for The Seeds Of Doom takes place at BBC Television Centre Studio 4 in White City, London The Seeds Of Doom
6 Birth of Noel Clarke (bio), who played Mickey Smith
6 Debut broadcast of The Android Invasion episode three on BBC One The Android Invasion
7 Recording for The Seeds Of Doom takes place in Buckland, Surrey The Seeds Of Doom
8 Recording for The Seeds Of Doom takes place in Buckland, Surrey The Seeds Of Doom
12 Debut broadcast of The Android Invasion episode four on BBC One The Android Invasion
15 Recording for The Seeds Of Doom takes place at BBC Television Centre Studio 8 in White City, London The Seeds Of Doom
15 A script called “Fires Of The Starmind” by Marc Platt is rejected The Fourth Doctor
mid
Dec
Elisabeth Sladen informs Philip Hinchcliffe that she will leave Doctor Who during Season Fourteen Sarah Jane
Smith
16 Recording for The Seeds Of Doom takes place at BBC Television Centre Studio 8 and the BBC Television Centre main entrance in White City, London The Seeds Of Doom
19 Recording for The Seeds Of Doom takes place at BBC Television Centre Studio 4 in White City, London The Seeds Of Doom