4th Doctor episode guide

Notes thanks to Whoguide & TARDIS Wikia – all images copyright DWW

4th Doctor Episode Guide

The Fourth Doctor was portrayed by Tom Baker. He is, to date, the actor who has played the Doctor for the longest time, having held the role for seven seasons.

All serials in this season continue directly one after the other, tracing one single problematic voyage of the TARDIS crew. Despite the continuity, each serial is considered its own standalone story. This season also introduced the character of Harry Sullivan portrayed by Ian Marter as a companion; this character was intended to undertake action scenes, during the period prior to Tom Baker being cast, when it was unclear how old the actor playing the new Doctor would be.

Story Serial Serial title Episode titles Directed by Written by Original air date Prod.
code
UK viewers
(millions) 
AI
75 1 Robot “Part One” Christopher Barry Terrance Dicks 28 December 1974 4A 10.8 53
“Part Two” Christopher Barry Terrance Dicks 4 January 1975 4A 10.7 53
“Part Three” Christopher Barry Terrance Dicks 11 January 1975 4A 10.1
“Part Four” Christopher Barry Terrance Dicks 18 January 1975 4A 9.0 51
76 2 The Ark in Space “Part One” Rodney Bennett Robert Holmes 25 January 1975 4C 9.4
“Part Two” Rodney Bennett Robert Holmes 1 February 1975 4C 13.6
“Part Three” Rodney Bennett Robert Holmes 8 February 1975 4C 11.2
“Part Four” Rodney Bennett Robert Holmes 15 February 1975 4C 10.2
77 3 The Sontaran Experiment “Part One” Rodney Bennett Bob Baker and Dave Martin 22 February 1975 4B 11.0
“Part Two” Rodney Bennett Bob Baker and Dave Martin 1 March 1975 4B 10.5 55
78 4 Genesis Of The Daleks “Part One” David Maloney Terry Nation 8 March 1975 4E 10.7
“Part Two” David Maloney Terry Nation 15 March 1975 4E 10.5 57
“Part Three” David Maloney Terry Nation 22 March 1975 4E 8.5
“Part Four” David Maloney Terry Nation 29 March 1975 4E 8.8 58
“Part Five” David Maloney Terry Nation 5 April 1975 4E 9.8 57
“Part Six” David Maloney Terry Nation 12 April 1975 4E 9.1 56
79 5 Revenge Of The Cybermen “Part One” Michael E. Briant Gerry Davis 19 April 1975 4D 9.5 57
“Part Two” Michael E. Briant Gerry Davis 26 April 1975 4D 8.3
“Part Three” Michael E. Briant Gerry Davis 3 May 1975 4D 8.9
“Part Four” Michael E. Briant Gerry Davis 10 May 1975 4D 9.4 58

During this season, Ian Marter (Harry Sullivan) left after Terror Of The Zygons, but returned for a guest appearance in The Android InvasionTerror Of The Zygons also saw the last semi-regular appearance of Nicholas Courtney (Brigadier Lethbridge-Stewart) who would not return until Season 20 in Mawdryn Undead.

Story Serial Serial title Episode titles Directed by Written by Original air date Prod.
code
UK viewers
(millions) 
AI
80 1 Terror Of The Zygons “Part One” Douglas Camfield Robert Banks Stewart 30 August 1975 4F 8.4 59
“Part Two” Douglas Camfield Robert Banks Stewart 6 September 1975 4F 6.1
“Part Three” Douglas Camfield Robert Banks Stewart 13 September 1975 4F 8.2 54
“Part Four” Douglas Camfield Robert Banks Stewart 20 September 1975 4F 7.2
81 2 Planet of Evil “Part One” David Maloney Louis Marks 27 September 1975 4H 10.4
“Part Two” David Maloney Louis Marks 4 October 1975 4H 9.9 56
“Part Three” David Maloney Louis Marks 11 October 1975 4H 9.1 57
“Part Four” David Maloney Louis Marks 18 October 1975 4H 10.1 54
82 3 Pyramids of Mars “Part One” Paddy Russell Stephen Harris (Lewis Greifer and Robert Holmes) 25 October 1975 4G 10.5
“Part Two” Paddy Russell Stephen Harris (Lewis Greifer and Robert Holmes) 1 November 1975 4G 11.3
“Part Three” Paddy Russell Stephen Harris (Lewis Greifer and Robert Holmes) 8 November 1975 4G 9.4
“Part Four” Paddy Russell Stephen Harris (Lewis Greifer and Robert Holmes) 15 November 1975 4G 11.7 60
83 4 The Android Invasion “Part One” Barry Letts Terry Nation 22 November 1975 4J 11.9 58
“Part Two” Barry Letts Terry Nation 29 November 1975 4J 11.3
“Part Three” Barry Letts Terry Nation 6 December 1975 4J 12.1
“Part Four” Barry Letts Terry Nation 13 December 1975 4J 11.4
84 5 The Brain Of Morbius “Part One” Christopher Barry Robin Bland (Terrance Dicks and Robert Holmes) 3 January 1976 4K 9.5
“Part Two” Christopher Barry Robin Bland (Terrance Dicks and Robert Holmes) 10 January 1976 4K 9.3
“Part Three” Christopher Barry Robin Bland (Terrance Dicks and Robert Holmes) 17 January 1976 4K 10.1 57
“Part Four” Christopher Barry Robin Bland (Terrance Dicks and Robert Holmes) 24 January 1976 4K 10.2
85 6 The Seeds of Doom “Part One” Douglas Camfield Robert Banks Stewart 31 January 1976 4L 11.4 59
“Part Two” Douglas Camfield Robert Banks Stewart 7 February 1976 4L 11.4
“Part Three” Douglas Camfield Robert Banks Stewart 14 February 1976 4L 10.3
“Part Four” Douglas Camfield Robert Banks Stewart 21 February 1976 4L 11.1
“Part Five” Douglas Camfield Robert Banks Stewart 28 February 1976 4L 9.9
“Part Six” Douglas Camfield Robert Banks Stewart 6 March 1976 4L 11.5

Elisabeth Sladen (Sarah Jane Smith) left the series this season in The Hand of Fear and was replaced by Louise Jameson (Leela) in The Face of Evil . The season also saw the first story in which the Doctor did not have a companion, The Deadly Assassin.

Story Serial Serial title Episode titles Directed by Written by Original air date Prod.
code
UK viewers
(millions) 
AI
86 1 The Masque of Mandragora “Part One” Rodney Bennett Louis Marks 4 September 1976 4M 8.3 58
“Part Two” Rodney Bennett Louis Marks 11 September 1976 4M 9.8 56
“Part Three” Rodney Bennett Louis Marks 18 September 1976 4M 9.2
“Part Four” Rodney Bennett Louis Marks 25 September 1976 4M 10.6 56
87 2 The Hand of Fear “Part One” Lennie Mayne Bob Baker and Dave Martin 2 October 1976 4N 10.5
“Part Two” Lennie Mayne Bob Baker and Dave Martin 9 October 1976 4N 10.2
“Part Three” Lennie Mayne Bob Baker and Dave Martin 16 October 1976 4N 11.1 62
“Part Four” Lennie Mayne Bob Baker and Dave Martin 23 October 1976 4N 12.0
88 3 The Deadly Assassin “Part One” David Maloney Robert Holmes 30 October 1976 4P 11.8
“Part Two” David Maloney Robert Holmes 6 November 1976 4P 12.1 59
“Part Three” David Maloney Robert Holmes 13 November 1976 4P 13.0
“Part Four” David Maloney Robert Holmes 20 November 1976 4P 11.8 61
89 4 The Face of Evil “Part One” Pennant Roberts Chris Boucher 1 January 1977 4Q 10.7 61
“Part Two” Pennant Roberts Chris Boucher 8 January 1977 4Q 11.1
“Part Three” Pennant Roberts Chris Boucher 15 January 1977 4Q 11.3 59
“Part Four” Pennant Roberts Chris Boucher 22 January 1977 4Q 11.7 60
90 5 The Robots Of Death “Part One” Michael E. Briant Chris Boucher 29 January 1977 4R 12.8 62
“Part Two” Michael E. Briant Chris Boucher 5 February 1977 4R 12.4
“Part Three” Michael E. Briant Chris Boucher 12 February 1977 4R 13.1
“Part Four” Michael E. Briant Chris Boucher 19 February 1977 4R 12.6 57
91 6 The Talons of Weng-Chiang “Part One” David Maloney Robert Holmes 26 February 1977 4S 11.3
“Part Two” David Maloney Robert Holmes 5 March 1977 4S 9.8
“Part Three” David Maloney Robert Holmes 12 March 1977 4S 10.2
“Part Four” David Maloney Robert Holmes 19 March 1977 4S 11.4 60
“Part Five” David Maloney Robert Holmes 26 March 1977 4S 10.1
“Part Six” David Maloney Robert Holmes 2 April 1977 4S 9.3 58

This season saw the final appearance of Leela and the first appearance of K9 as voiced by John Leeson.

Story Serial Serial title Episode titles Directed by Written by Original air date Prod.
code
UK viewers
(millions) 
AI
92 1 Horror of Fang Rock “Part One” Paddy Russell Terrance Dicks 3 September 1977 4V 6.8 58
“Part Two” Paddy Russell Terrance Dicks 10 September 1977 4V 7.1
“Part Three” Paddy Russell Terrance Dicks 17 September 1977 4V 9.8 60
“Part Four” Paddy Russell Terrance Dicks 24 September 1977 4V 9.9 57
93 2 The Invisible Enemy “Part One” Derrick Goodwin Bob Baker and Dave Martin 1 October 1977 4T 8.6
“Part Two” Derrick Goodwin Bob Baker and Dave Martin 8 October 1977 4T 7.3
“Part Three” Derrick Goodwin Bob Baker and Dave Martin 15 October 1977 4T 7.5
“Part Four” Derrick Goodwin Bob Baker and Dave Martin 22 October 1977 4T 8.3 60
94 3 Image of the Fendahl “Part One” George Spenton-Foster Chris Boucher 29 October 1977 4X 6.7
“Part Two” George Spenton-Foster Chris Boucher 5 November 1977 4X 7.5
“Part Three” George Spenton-Foster Chris Boucher 12 November 1977 4X 7.9
“Part Four” George Spenton-Foster Chris Boucher 19 November 1977 4X 9.1 61
95 4 The Sun Makers “Part One” Pennant Roberts Robert Holmes 26 November 1977 4W 8.5
“Part Two” Pennant Roberts Robert Holmes 3 December 1977 4W 9.5
“Part Three” Pennant Roberts Robert Holmes 10 December 1977 4W 8.9 68
“Part Four” Pennant Roberts Robert Holmes 17 December 1977 4W 8.4 59
96 5 Underworld “Part One” Norman Stewart Bob Baker and Dave Martin 7 January 1978 4Y 8.9 65
“Part Two” Norman Stewart Bob Baker and Dave Martin 14 January 1978 4Y 9.1
“Part Three” Norman Stewart Bob Baker and Dave Martin 21 January 1978 4Y 8.9
“Part Four” Norman Stewart Bob Baker and Dave Martin 28 January 1978 4Y 11.7
97 6 The Invasion Of Time “Part One” Gerald Blake David Agnew (Graham Williams and Anthony Read) 4 February 1978 4Z 11.2 56
“Part Two” Gerald Blake David Agnew (Graham Williams and Anthony Read) 11 February 1978 4Z 11.4
“Part Three” Gerald Blake David Agnew (Graham Williams and Anthony Read) 18 February 1978 4Z 9.5
“Part Four” Gerald Blake David Agnew (Graham Williams and Anthony Read) 25 February 1978 4Z 10.9
“Part Five” Gerald Blake David Agnew (Graham Williams and Anthony Read) 4 March 1978 4Z 10.3
“Part Six” Gerald Blake David Agnew (Graham Williams and Anthony Read) 11 March 1978 4Z 9.8

Season 16 consists of one long story arc encompassing six separate, linked stories. This season is referred to by the umbrella title The Key to Time and has been released on DVD under this title. This season introduced Mary Tamm as Romana I.

Story Serial Serial title Episode titles Directed by Written by Original air date Prod.
code
UK viewers
(millions) 
AI
98 1 The Ribos Operation “Part One” George Spenton-Foster Robert Holmes 2 September 1978 5A 8.3 59
“Part Two” George Spenton-Foster Robert Holmes 9 September 1978 5A 8.1
“Part Three” George Spenton-Foster Robert Holmes 16 September 1978 5A 7.9
“Part Four” George Spenton-Foster Robert Holmes 23 September 1978 5A 8.2 67
99 2 The Pirate Planet “Part One” Pennant Roberts Douglas Adams 30 September 1978 5B 9.1 61
“Part Two” Pennant Roberts Douglas Adams 7 October 1978 5B 7.4
“Part Three” Pennant Roberts Douglas Adams 14 October 1978 5B 8.2 64
“Part Four” Pennant Roberts Douglas Adams 21 October 1978 5B 8.4 64
100 3 The Stones of Blood “Part One” Darrol Blake David Fisher 28 October 1978 5C 8.6
“Part Two” Darrol Blake David Fisher 4 November 1978 5C 6.6
“Part Three” Darrol Blake David Fisher 11 November 1978 5C 9.3
“Part Four” Darrol Blake David Fisher 18 November 1978 5C 7.6 67
101 4 The Androids of Tara “Part One” Michael Hayes David Fisher 25 November 1978 5D 9.5
“Part Two” Michael Hayes David Fisher 2 December 1978 5D 10.1 65
“Part Three” Michael Hayes David Fisher 9 December 1978 5D 8.9
“Part Four” Michael Hayes David Fisher 16 December 1978 5D 9.0 66
102 5 The Power of Kroll “Part One” Norman Stewart Robert Holmes 23 December 1978 5E 6.5
“Part Two” Norman Stewart Robert Holmes 30 December 1978 5E 12.4
“Part Three” Norman Stewart Robert Holmes 6 January 1979 5E 8.9
“Part Four” Norman Stewart Robert Holmes 13 January 1979 5E 9.9 63
103 6 The Armageddon Factor “Part One” Michael Hayes Bob Baker and Dave Martin 20 January 1979 5F 7.5 65
“Part Two” Michael Hayes Bob Baker and Dave Martin 27 January 1979 5F 8.8
“Part Three” Michael Hayes Bob Baker and Dave Martin 3 February 1979 5F 7.8
“Part Four” Michael Hayes Bob Baker and Dave Martin 10 February 1979 5F 8.6
“Part Five” Michael Hayes Bob Baker and Dave Martin 17 February 1979 5F 8.6
“Part Six” Michael Hayes Bob Baker and Dave Martin 24 February 1979 5F 9.6 66

During this season, the role of Romana was taken over by Lalla Ward.

Story Serial Serial title Episode titles Directed by Written by Original air date Prod.
code
UK viewers
(millions) 
AI
104 1 Destiny Of The Daleks “Episode One” Ken Grieve Terry Nation 1 September 1979 5J 13.0 67
“Episode Two” Ken Grieve Terry Nation 8 September 1979 5J 12.7
“Episode Three” Ken Grieve Terry Nation 15 September 1979 5J 13.8 63
“Episode Four” Ken Grieve Terry Nation 22 September 1979 5J 14.4 64
105 2 City of Death “Part One” Michael Hayes David Agnew (Douglas Adams, Graham Williams and David Fisher) 29 September 1979 5H 12.4
“Part Two” Michael Hayes David Agnew (Douglas Adams, Graham Williams and David Fisher) 6 October 1979 5H 14.1 64
“Part Three” Michael Hayes David Agnew (Douglas Adams, Graham Williams and David Fisher) 13 October 1979 5H 15.4
“Part Four” Michael Hayes David Agnew (Douglas Adams, Graham Williams and David Fisher) 20 October 1979 5H 16.1 64
106 3 The Creature from the Pit “Part One” Christopher Barry David Fisher 27 October 1979 5G 9.3
“Part Two” Christopher Barry David Fisher 3 November 1979 5G 10.8 67
“Part Three” Christopher Barry David Fisher 10 November 1979 5G 10.2
“Part Four” Christopher Barry David Fisher 17 November 1979 5G 9.6
107 4 Nightmare of Eden “Part One” Alan Bromly Bob Baker 24 November 1979 5K 8.7
“Part Two” Alan Bromly Bob Baker 1 December 1979 5K 9.6
“Part Three” Alan Bromly Bob Baker 8 December 1979 5K 9.6
“Part Four” Alan Bromly Bob Baker 15 December 1979 5K 9.4 65
108 5 The Horns of Nimon “Part One” Kenny McBain Anthony Read 22 December 1979 5L 6.0
“Part Two” Kenny McBain Anthony Read 29 December 1979 5L 8.8
“Part Three” Kenny McBain Anthony Read 5 January 1980 5L 9.8
“Part Four” Kenny McBain Anthony Read 12 January 1980 5L 10.4 67
6 Shada N/A Pennant Roberts Douglas Adams Unaired[note 2] 5M

In a return to the format of early seasons, virtually all serials from Seasons 18 through 20 are linked together, often running directly into each other. Season 18 forms a loose story arc dealing with the theme of entropy. Full CircleState of Decay, and Warriors’ Gate trace the Doctor’s adventures in E-Space; they were released in both VHS and DVD boxsets with the umbrella title The E-Space Trilogy. This season saw the departure of Romana and the introduction of companions Adric and Nyssa, and soon-to-be companion, Tegan Jovanka.

Story Serial Serial title Episode titles Directed by Written by Original air date Prod.
code
UK viewers
(millions) 
AI
109 1 The Leisure Hive “Part One” Lovett Bickford David Fisher 30 August 1980 5N 5.9
“Part Two” Lovett Bickford David Fisher 6 September 1980 5N 5.0
“Part Three” Lovett Bickford David Fisher 13 September 1980 5N 5.0
“Part Four” Lovett Bickford David Fisher 20 September 1980 5N 4.5 65
110 2 Meglos “Part One” Terence Dudley John Flanagan & Andrew McCulloch 27 September 1980 5Q 5.0 61
“Part Two” Terence Dudley John Flanagan & Andrew McCulloch 4 October 1980 5Q 4.2 64
“Part Three” Terence Dudley John Flanagan & Andrew McCulloch 11 October 1980 5Q 4.7
“Part Four” Terence Dudley John Flanagan & Andrew McCulloch 18 October 1980 5Q 4.7 63
111 3 Full Circle “Part One” Peter Grimwade Andrew Smith 25 October 1980 5R 5.9
“Part Two” Peter Grimwade Andrew Smith 1 November 1980 5R 3.7
“Part Three” Peter Grimwade Andrew Smith 8 November 1980 5R 5.9
“Part Four” Peter Grimwade Andrew Smith 15 November 1980 5R 5.4 65
112 4 State of Decay “Part One” Peter Moffatt Terrance Dicks 22 November 1980 5P 5.8
“Part Two” Peter Moffatt Terrance Dicks 29 November 1980 5P 5.3
“Part Three” Peter Moffatt Terrance Dicks 6 December 1980 5P 4.4
“Part Four” Peter Moffatt Terrance Dicks 13 December 1980 5P 5.4 69
113 5 Warriors’ Gate “Part One” Paul Joyce & Graeme Harper(uncredited) Stephen Gallagher 3 January 1981 5S 7.1 59
“Part Two” Paul Joyce & Graeme Harper(uncredited) Stephen Gallagher 10 January 1981 5S 6.7
“Part Three” Paul Joyce & Graeme Harper(uncredited) Stephen Gallagher 17 January 1981 5S 8.3
“Part Four” Paul Joyce & Graeme Harper(uncredited) Stephen Gallagher 24 January 1981 5S 7.8 59
114 6 The Keeper Of Traken “Part One” John Black Johnny Byrne 31 January 1981 5T 7.6
“Part Two” John Black Johnny Byrne 7 February 1981 5T 6.1
“Part Three” John Black Johnny Byrne 14 February 1981 5T 5.2
“Part Four” John Black Johnny Byrne 21 February 1981 5T 6.1 63
115 7 Logopolis “Part One” Peter Grimwade Christopher H. Bidmead 28 February 1981 5V 7.7
“Part Two” Peter Grimwade Christopher H. Bidmead 7 March 1981 5V 7.7 61
“Part Three” Peter Grimwade Christopher H. Bidmead 14 March 1981 5V 5.8
“Part Four” Peter Grimwade Christopher H. Bidmead 21 March 1981 5V 6.1 65

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