The Doctor Who Production Diary: 1973

January
early
Jan
Barry Letts agrees with Katy Manning's suggestion that the time has come for her to leave Doctor Who; Robert Sloman is asked to amend The Green Death to write out Jo Jo
Grant
2 Location filming for Planet Of The Daleks takes place in Redhill, Surrey Planet Of The Daleks
3 Location filming for Planet Of The Daleks takes place in Redhill, Surrey Planet Of The Daleks
4 Brian Hayles is commissioned to provide a storyline for The Monster Of Peladon The Monster Of Peladon
4 Filming for Planet Of The Daleks takes place at the Ealing Television Film Studios Planet Of The Daleks
5 Filming for Planet Of The Daleks takes place at the Ealing Television Film Studios Planet Of The Daleks
6 Debut broadcast of The Three Doctors episode two on BBC1 The Three Doctors
8 Filming for Planet Of The Daleks takes place at the Ealing Television Film Studios Planet Of The Daleks
9 Filming for Planet Of The Daleks takes place at the Ealing Television Film Studios Planet Of The Daleks
13 Debut broadcast of The Three Doctors episode three on BBC1 The Three Doctors
14 Elvis Presley's Aloha From Hawaii concert is the first wordwide broadcast by an entertainer
16 Robert Holmes is commissioned to provide a storyline for “The Automata” The Third Doctor
16 Filming for Planet Of The Daleks takes place at an unknown location Planet Of The Daleks
17 Malcolm Hulke is commissioned to provide the storyline for Invasion Of The Dinosaurs Invasion Of The Dinosaurs
20 Debut broadcast of The Three Doctors episode four on BBC1 The Three Doctors
22 Recording for Frontier In Space takes place in BBC Television Centre Studio 4 Frontier In Space
22 Recording for Planet Of The Daleks takes place in BBC Television Centre Studio 4 Planet Of The Daleks
23 Recording for Planet Of The Daleks takes place in BBC Television Centre Studio 4 Planet Of The Daleks
26 Robert Holmes' “The Automata” is rejected, leading to him beginning work on The Time Warrior The Time Warrior
27 Debut broadcast of Carnival Of Monsters episode one on BBC1 Carnival Of Monsters
27 Filming for Planet Of The Daleks takes place at an unknown location Planet Of The Daleks
29 Filming for Planet Of The Daleks takes place at an unknown location Planet Of The Daleks

February
3 Debut broadcast of Carnival Of Monsters episode two on BBC1 Carnival Of Monsters
5 Recording for Planet Of The Daleks takes place in BBC Television Centre Studio 6 Planet Of The Daleks
6 Recording for Planet Of The Daleks takes place in BBC Television Centre Studio 6 Planet Of The Daleks
10 Debut broadcast of Carnival Of Monsters episode three on BBC1 Carnival Of Monsters
15 Robert Sloman is commissioned to provide a storyline for “The Final Game” The Third Doctor
17 Debut broadcast of Carnival Of Monsters episode four on BBC1 Carnival Of Monsters
19 Recording for Planet Of The Daleks takes place in BBC Television Centre Studio 1 Planet Of The Daleks
20 Recording for Planet Of The Daleks takes place in BBC Television Centre Studio 1 Planet Of The Daleks
24 Debut broadcast of Frontier In Space episode one on BBC1 Frontier In Space
26 Robert Holmes is commissioned to provide a storyline for The Time Warrior The Time Warrior

March
3 Debut broadcast of Frontier In Space episode two on BBC1 Frontier In Space
5 Robert Holmes is commissioned to write The Time Warrior The Time Warrior
6 Richard Franklin is contracted for The Green Death Captain
Mike Yates
8 John Levene is contracted for The Green Death Sergeant
John Benton
10 Debut broadcast of Frontier In Space episode three on BBC1 Frontier In Space
12 Location filming for The Green Death takes place in Troed-y-rhiw, Wales and Deri, Wales The Green Death
13 Location filming for The Green Death takes place in Deri, Wales The Green Death
14 Nicholas Courtney is contracted for The Green Death Brigadier Alistair Gordon Lethbridge-Stewart
14 Location filming for The Green Death takes place in Deri, Wales The Green Death
15 Location filming for The Green Death takes place in Deri, Wales The Green Death
16 Location filming for The Green Death takes place in Brynmawr, Wales The Green Death
17 Debut broadcast of Frontier In Space episode four on BBC1 Frontier In Space
17 Filming for The Green Death takes place at an unknown location The Green Death
19 Location filming for The Green Death takes place in Brynmawr, Wales The Green Death
20 Location filming for The Green Death takes place in Brynmawr, Wales The Green Death
23 Terry Nation is commissioned to provide a storyline for Death To The Daleks Death To The Daleks
24 Debut broadcast of Frontier In Space episode five on BBC1 Frontier In Space
29 The last American soldier leaves Vietnam following the signing of the Paris Peace Accords two months earlier
31 Debut broadcast of Frontier In Space episode six on BBC1 Frontier In Space

April
2 Recording for The Green Death takes place in BBC Television Centre Studio 3 The Green Death
3 Recording for The Green Death takes place in BBC Television Centre Studio 3 The Green Death
7 Debut broadcast of Planet Of The Daleks episode one on BBC1 Planet Of The Daleks
14 Debut broadcast of Planet Of The Daleks episode two on BBC1 Planet Of The Daleks
16 Recording for The Green Death takes place in BBC Television Centre Studio 3 The Green Death
17 Recording for The Green Death takes place in BBC Television Centre Studio 3 The Green Death
21 Debut broadcast of Planet Of The Daleks episode three on BBC1 Planet Of The Daleks
28 Debut broadcast of Planet Of The Daleks episode four on BBC1 Planet Of The Daleks
29 Recording for The Green Death takes place in BBC Television Centre Studio 3 The Green Death
30 Recording for The Green Death takes place in BBC Television Centre Studio 3; Katy Manning leaves Doctor Who The Green Death

May
3 Elisabeth Sladen is contracted to play new companion Sarah Jane Smith for Season Eleven Sarah Jane 
Smith
5 Debut broadcast of Planet Of The Daleks episode five on BBC1 Planet Of The Daleks
7 Location filming for The Time Warrior takes place in Peckforton, Cheshire; Elisabeth Sladen joins the regular cast of Doctor Who The Time Warrior
8 Location filming for The Time Warrior takes place in Peckforton, Cheshire The Time Warrior
9 Location filming for The Time Warrior takes place in Peckforton, Cheshire The Time Warrior
10 Location filming for The Time Warrior takes place in Peckforton, Cheshire The Time Warrior
12 Debut broadcast of Planet Of The Daleks episode six on BBC1 Planet Of The Daleks
19 Debut broadcast of The Green Death episode one on BBC1 The Green Death
26 Debut broadcast of The Green Death episode two on BBC1 The Green Death
28 Recording for The Time Warrior takes place in BBC Television Centre Studio 6 The Time Warrior
29 Recording for The Time Warrior takes place in BBC Television Centre Studio 6 The Time Warrior

June
2 Debut broadcast of The Green Death episode three on BBC1 The Green Death
9 Debut broadcast of The Green Death episode four on BBC1 The Green Death
11 Recording for The Time Warrior takes place in BBC Television Centre Studio 1 The Time Warrior
12 Recording for The Time Warrior takes place in BBC Television Centre Studio 1 The Time Warrior
16 Debut broadcast of The Green Death episode five on BBC1 The Green Death
18 Roger Delgado (the Master) dies; as a result of the tragedy, “The Final Game” is abandoned The
Master
22 Katy Manning's departure is announced to the press Jo
Grant
23 A photocall is held to introduce Elisabeth Sladen as new companion Sarah Jane Smith Sarah Jane 
Smith
23 Debut broadcast of The Green Death episode six on BBC1 The Green Death

July
2 Malcolm Hulke is commissioned to write Invasion Of The Dinosaurs Invasion Of The Dinosaurs
2 Terry Nation is commissioned to write Death To The Daleks Death To The Daleks
12 Brian Hayles is commissioned to write The Monster Of Peladon The Monster Of Peladon

August

September
2 Location filming for Invasion Of The Dinosaurs takes place in London Invasion Of The Dinosaurs
3 JRR Tolkien, author of the fantasy classic The Lord Of The Rings, passes away
5 Richard Franklin is contracted for Invasion Of The Dinosaurs Captain
Mike Yates
14 Nicholas Courtney is contracted for Invasion Of The Dinosaurs Brigadier Alistair Gordon Lethbridge-Stewart
23 Location filming for Invasion Of The Dinosaurs takes place in London Invasion Of The Dinosaurs
24 Location filming for Invasion Of The Dinosaurs takes place in London Invasion Of The Dinosaurs
25 Location filming for Invasion Of The Dinosaurs takes place in London Invasion Of The Dinosaurs
26 Location filming for Invasion Of The Dinosaurs takes place in London Invasion Of The Dinosaurs
27 Location filming for Invasion Of The Dinosaurs takes place in London Invasion Of The Dinosaurs
29 Location filming for Invasion Of The Dinosaurs takes place in London Invasion Of The Dinosaurs

October
early
Oct
With Terrance Dicks having decided to leave Doctor Who after Season Eleven, Robert Holmes begins trailing him as he prepares to take over as script editor The Third Doctor
6 An attack against Israel by Egypt and Syria marks the beginning of the Yom Kippur War
8 Filming for Invasion Of The Dinosaurs takes place at an unknown location Invasion Of The Dinosaurs
9 Filming for Invasion Of The Dinosaurs takes place at an unknown location Invasion Of The Dinosaurs
15 Recording for Invasion Of The Dinosaurs takes place in BBC Television Centre Studio 6 Invasion Of The Dinosaurs
16 Recording for Invasion Of The Dinosaurs takes place in BBC Television Centre Studio 6 Invasion Of The Dinosaurs
18 Filming for Invasion Of The Dinosaurs takes place at an unknown location Invasion Of The Dinosaurs
19 Filming for Invasion Of The Dinosaurs takes place at an unknown location Invasion Of The Dinosaurs
20 The Sydney Opera House opens
20 Filming for Invasion Of The Dinosaurs takes place at an unknown location Invasion Of The Dinosaurs
29 Recording for Invasion Of The Dinosaurs takes place in BBC Television Centre Studio 8 Invasion Of The Dinosaurs
30 Recording for Invasion Of The Dinosaurs takes place in BBC Television Centre Studio 8 Invasion Of The Dinosaurs

November
1 Filming for Invasion Of The Dinosaurs takes place at an unknown location Invasion Of The Dinosaurs
6 Filming for Invasion Of The Dinosaurs takes place at an unknown location Invasion Of The Dinosaurs
12 Recording for Invasion Of The Dinosaurs takes place in BBC Television Centre Studio 4 Invasion Of The Dinosaurs
13 Recording for Invasion Of The Dinosaurs takes place in BBC Television Centre Studio 4 Invasion Of The Dinosaurs
13 Location filming for Death To The Daleks takes place in Gallows Hill, Dorset Death To The Daleks
14 Location filming for Death To The Daleks takes place in Gallows Hill, Dorset Death To The Daleks
15 Location filming for Death To The Daleks takes place in Gallows Hill, Dorset Death To The Daleks
16 Location filming for Death To The Daleks takes place in Gallows Hill, Dorset Death To The Daleks
19 Location filming for Death To The Daleks takes place in Gallows Hill, Dorset Death To The Daleks
late
Nov
Barry Letts announces that he will be leaving Doctor Who following Season Eleven, prompting Jon Pertwee to soon make a similar decision The Third Doctor

December
3 Recording for Death To The Daleks takes place in BBC Television Centre Studio 4 Death To The Daleks
4 Recording for Death To The Daleks takes place in BBC Television Centre Studio 4 Death To The Daleks
5 Robert Sloman is commissioned to write Planet Of The Spiders as a replacement for “The Final Test” Planet Of The Spiders
15 Debut broadcast of The Time Warrior episode one on BBC1; a new title sequence, created by Bernard Lodge and used from 1973 to 1980, is introduced The Time Warrior
17 Recording for Death To The Daleks takes place in BBC Television Centre Studio 4 Death To The Daleks
18 Recording for Death To The Daleks takes place in BBC Television Centre Studio 4 Death To The Daleks
22 Debut broadcast of The Time Warrior episode two on BBC1 The Time Warrior
29 Debut broadcast of The Time Warrior episode three on BBC1 The Time Warrior