User:Sumestest/DWSandbox

Doctor Who is a British science fiction television programme produced by the BBC. As of 15 November 2009, 754 individual episodes, including one television movie of Doctor Who have been aired, encompassing 201 stories. Additionally, four charity specials and one animated serial have been aired, and two short sequences – A Fix with Sontarans and Attack of the Graske – were produced and involved the interaction of a viewer (the former was a segment of Jim'll Fix It, while the latter was a fully-interactive adventure). The show's high episode count resulted in Doctor Who holding the world record for the highest number of episodes for a science-fiction programme. For comparison, the record holder for the highest number of consecutive episodes, Stargate SG-1, aired 214 episodes.

Each serial up to 1989's Survival, with the exception of one cutaway and one special, was a multi-episode story; the characters in the column after the serial titles indicate the code used by the production team to designate the serial (where applicable) and are followed either by the titles of the individual episodes where given or by the number of episodes otherwise. Unless otherwise noted, episodes in this period are 25 minutes long.

Starting with the 2005 revival, the production team abandoned the traditional serial format for a largely self-contained episodic format with occasional multi-part story and loose story arcs, similar to the style of American dramas such as Buffy the Vampire Slayer or The X-Files. Unless otherwise noted, the new episodes are 45 minutes long.

Additionally, some other subsets of serials and episodes exist. Some are unmade: they were proposed for a variety of reasons, some reaching post-production, but not broadcast. Some episodes from the 1960s are missing due to the BBC's 1970s junking policy, and thus their serials are incomplete. Also, in the first two seasons and most of the third, each episode of a serial had an individual title; no serial had an overall onscreen title until The Savages. The serial titles given below are the most common title for the serials as a whole, used in sources such as the Doctor Who Reference Guide and the BBC's classic episode guide, and are generally those used for commercial release. The practice of individually titled episodes resurfaced with the show's 2005 revival, when Doctor Who's serial nature was abandoned in favour of an episodic format.

The three-digit story numbers are not official designations but are merely to serve as a guide to where the story stands in the overall context of the programme. There is some dispute about, for example, whether to count Season 23's The Trial of a Time Lord as one or four serials, and whether the uncompleted Shada should be included. The numbering scheme used here reflects internal practice of describing "Planet of the Dead" (2009) as the 200th story, used in the official magazine's 407th issue. Other sources, such as the Region 1 DVDs of classic Doctor Who serials, use different numbering schemes which diverge after the 108th story, The Horns of Nimon (1979–1980).

During the early seasons of the programme most serials are linked together, one usually leading directly into the next – although there are some breaks, such as between the Season Two finale The Time Meddler and the Season Three premiere Galaxy 4.

First Doctor

The first televised incarnation of The Doctor was portrayed by William Hartnell. During Hartnell's tenure, the Doctor visited a mixture of both stories set in the future and historical events that had no extraterrestrial influence, such as fifteenth century Mesoamerica. In his last story, The Tenth Planet, the Doctor gradually grew weaker to the point of collapsing at the end of Episode Four, leading to his regeneration.

Season 1 (1963–1964)

<span class="anchor" id="Season 1 (1963–1964) "> Verity Lambert was producer with David Whitaker serving as script editor.

No	Title	Code	Episodes	Writer	Director	Original airdate
001	An Unearthly Child aka 100,000 BC aka The Tribe of Gum	A	"An Unearthly Child" "The Cave of Skulls" "The Forest of Fear" "The Firemaker"	Anthony Coburn (and C. E. Webber)[a]	Waris Hussein	23 November 1963 30 November 1963 7 December 1963 14 December 1963
002	The Daleks aka The Mutants aka The Dead Planet	B	"The Dead Planet" "The Survivors" "The Escape" "The Ambush" "The Expedition" "The Ordeal" "The Rescue"	Terry Nation	Richard Martin & Christopher Barry	21 December 1963 28 December 1963 4 January 1964 11 January 1964 18 January 1964 25 January 1964 1 February 1964
003	The Edge of Destruction aka Inside the Spaceship aka Beyond the Sun	C	"The Edge of Destruction" "The Brink of Disaster"	David Whitaker	Richard Martin & Frank Cox	8 February 1964 15 February 1964
004	Marco Polo aka A Journey to Cathay	D	"The Roof of the World" "The Singing Sands" "Five Hundred Eyes" "The Wall of Lies" "Rider from Shang-Tu" "Mighty Kublai Khan" "Assassin at Peking" (all missing)	John Lucarotti	Waris Hussein	22 February 1964 29 February 1964 7 March 1964 14 March 1964 21 March 1964 28 March 1964 4 April 1964
005	The Keys of Marinus aka The Sea of Death	E	"The Sea of Death" "The Velvet Web" "The Screaming Jungle" "The Snows of Terror" "Sentence of Death" "The Keys of Marinus"	Terry Nation	John Gorrie	11 April 1964 18 April 1964 25 April 1964 2 May 1964 9 May 1964 16 May 1964
006	The Aztecs	F	"The Temple of Evil" "The Warriors of Death" "The Bride of Sacrifice" "The Day of Darkness"	John Lucarotti	John Crockett	23 May 1964 30 May 1964 6 June 1964 13 June 1964
007	The Sensorites	G	"Strangers in Space" "The Unwilling Warriors" "Hidden Danger" "A Race Against Death" "Kidnap" "A Desperate Venture"	Peter R. Newman	Mervyn Pinfield & Frank Cox	20 June 1964 27 June 1964 11 July 1964 18 July 1964 25 July 1964 1 August 1964
008	The Reign of Terror aka The French Revolution	H	"A Land of Fear" "Guests of Madame Guillotine" "A Change of Identity" "The Tyrant of France" "A Bargain of Necessity" "Prisoners of Conciergerie" (episodes 4-5 missing)	Dennis Spooner	Henric Hirsch & John Gorrie	8 August 1964 15 August 1964 22 August 1964 29 August 1964 5 September 1964 12 September 1964

Season 2 (1964–1965)

<span class="anchor" id="Season 2 (1964–1965) "> Dennis Spooner replaced David Whitaker as script editor after The Dalek Invasion of Earth, and edited the remainder of the season apart from The Time Meddler, which was edited by Donald Tosh.

No	Title	Code	Episodes	Writer	Director	Original airdate
009	Planet of Giants	J	"Planet of Giants" "Dangerous Journey" "Crisis"	Louis Marks	Mervyn Pinfield & Douglas Camfield	31 October 1964 7 November 1964 14 November 1964
010	The Dalek Invasion of Earth aka World's End	K	"World's End" "The Daleks" "Day of Reckoning" "The End of Tomorrow" "The Waking Ally" "Flashpoint"	Terry Nation	Richard Martin	21 November 1964 28 November 1964 5 December 1964 12 December 1964 19 December 1964 26 December 1964
011	The Rescue	L	"The Powerful Enemy" "Desperate Measures"	David Whitaker	Christopher Barry	2 January 1965 9 January 1965
012	The Romans	M	"The Slave Traders" "All Roads Lead to Rome" "Conspiracy" "Inferno"	Dennis Spooner	Christopher Barry	16 January 1965 23 January 1965 30 January 1965 6 February 1965
013	The Web Planet aka The Zarbi	N	"The Web Planet" "The Zarbi" "Escape to Danger" "Crater of Needles" "Invasion" "The Centre"	Bill Strutton	Richard Martin	13 February 1965 20 February 1965 27 February 1965 6 March 1965 13 March 1965 20 March 1965
014	The Crusade aka The Lionheart aka The Crusaders	P	"The Lion" "The Knight of Jaffa" "The Wheel of Fortune" "The Warlords" (episodes 2 & 4 missing)	David Whitaker	Douglas Camfield	27 March 1965 3 April 1965 10 April 1965 17 April 1965
015	The Space Museum	Q	"The Space Museum" "The Dimensions of Time" "The Search" "The Final Phase"	Glyn Jones	Mervyn Pinfield	24 April 1965 1 May 1965 8 May 1965 15 May 1965
016	The Chase	R	"The Executioners" "The Death of Time" "Flight Through Eternity" "Journey into Terror" "The Death of Doctor Who" "The Planet of Decision"	Terry Nation	Richard Martin & Douglas Camfield	22 May 1965 29 May 1965 5 June 1965 12 June 1965 19 June 1965 26 June 1965
017	The Time Meddler	S	"The Watcher" "The Meddling Monk" "A Battle of Wits" "Checkmate"	Dennis Spooner	Douglas Camfield	3 July 1965 10 July 1965 17 July 1965 24 July 1965

Season 3 (1965–1966)

<span class="anchor" id="Season 3 (1965–1966) "> John Wiles replaced Verity Lambert as producer after Mission to the Unknown. Innes Lloyd, in turn, replaced Wiles after The Ark. Donald Tosh continued as script editor until The Massacre of St Bartholomew's Eve, which was also script-edited by his replacement, Gerry Davis. The practice of giving each individual episode a different title was abandoned after The Gunfighters, near the end of the season.

No	Title	Code	Episodes	Writer	Director	Original airdate
018	Galaxy 4	T	"Four Hundred Dawns" "Trap of Steel" "Airlock" "The Exploding Planet" (all missing)	William Emms	Derek Martinus & Mervyn Pinfield	11 September 1965 18 September 1965 25 September 1965 2 October 1965
019	"Mission to the Unknown" aka "Dalek Cutaway"	T/A or DC	"Mission to the Unknown" (missing)	Terry Nation	Derek Martinus	9 October 1965
020	The Myth Makers	U	"Temple of Secrets" "Small Prophet, Quick Return" "Death of a Spy" "Horse of Destruction" (all missing)	Donald Cotton	Michael Leeston-Smith	16 October 1965 23 October 1965 30 October 1965 6 November 1965
021	The Daleks' Master Plan	V	"The Nightmare Begins" "Day of Armageddon" "Devil's Planet" "The Traitors" "Counter Plot" "Coronas of the Sun" "The Feast of Steven" "Volcano" "Golden Death" "Escape Switch" "The Abandoned Planet" "Destruction of Time" (episodes 1, 3-4, 6-9, & 11-12 missing)	Terry Nation & Dennis Spooner	Douglas Camfield	13 November 1965 20 November 1965 27 November 1965 4 December 1965 11 December 1965 18 December 1965 25 December 1965 1 January 1966 8 January 1966 15 January 1966 22 January 1966 29 January 1966
022	The Massacre of St Bartholomew's Eve aka The Massacre	W	"War of God" "The Sea Beggar" "Priest of Death" "Bell of Doom" (all episodes missing)	John Lucarotti & Donald Tosh	Paddy Russell	5 February 1966 12 February 1966 19 February 1966 26 February 1966
023	The Ark	X	"The Steel Sky" "The Plague" "The Return" "The Bomb"	Paul Erickson & Lesley Scott	Michael Imison	5 March 1966 12 March 1966 19 March 1966 26 March 1966
024	The Celestial Toymaker	Y	"The Celestial Toyroom" "The Hall of Dolls" "The Dancing Floor" "The Final Test" (episodes 1-3 missing)	Brian Hayles (and Donald Tosh)	Bill Sellars	2 April 1966 9 April 1966 16 April 1966 23 April 1966
025	The Gunfighters	Z	"A Holiday for the Doctor" "Don't Shoot the Pianist" "Johnny Ringo" "The OK Corral"	Donald Cotton	Rex Tucker	30 April 1966 7 May 1966 14 May 1966 21 May 1966
026	The Savages[b]	AA	4 episodes (all missing)	Ian Stuart Black	Christopher Barry	28 May – 18 June 1966
027	The War Machines	BB	4 episodes	Ian Stuart Black (and Kit Pedler)	Michael Ferguson	25 June – 16 July 1966

Season 4 (1966–1967)

<span class="anchor" id="Season 4 (1966–1967) ">

No	Title	Code	Episodes	Writer	Director	Original airdate
028	The Smugglers	CC	4 episodes (all missing)	Brian Hayles	Julia Smith	10 September – 1 October 1966
029	The Tenth Planet	DD	4 episodes (episode 4 missing)	Kit Pedler & Gerry Davis	Derek Martinus	8–29 October 1966

Second Doctor

The Second Doctor was portrayed by Patrick Troughton, whose serials were more action-oriented. He retained the role until the last episode of The War Games when members of the Doctor's race, the Time Lords, put him on trial for breaking the laws of time.

Season 4 (1966–1967), continued

Peter Bryant joined as associate producer for The Faceless Ones, and replaced Gerry Davis as script editor for the last four episodes of The Evil of the Daleks.

No	Title	Code	Episodes	Writer	Director	Original airdate
030	The Power of the Daleks	EE	6 episodes (all episodes missing)	David Whitaker (and Dennis Spooner)	Christopher Barry	5 November – 10 December 1966
031	The Highlanders	FF	4 episodes (all missing)	Elwyn Jones & Gerry Davis	Hugh David	17 December 1966 – 7 January 1967
032	The Underwater Menace	GG	4 episodes (episodes 1, 2, & 4 missing)	Geoffrey Orme	Julia Smith	14 January – 4 February 1967
033	The Moonbase	HH	4 episodes (episodes 1 & 3 missing)	Kit Pedler	Morris Barry	11 February – 4 March 1967
034	The Macra Terror	JJ	4 episodes (all missing)	Ian Stuart Black	John Howard Davies	11 March – 1 April 1967
035	The Faceless Ones	KK	6 episodes (episodes 2 & 4-6 missing)	David Ellis & Malcolm Hulke	Gerry Mill	8 April – 13 May 1967
036	The Evil of the Daleks	LL	7 episodes (episodes 1 & 3-7 missing)	David Whitaker	Derek Martinus	20 May – 1 July 1967

Season 5 (1967–1968)

<span class="anchor" id="Season 5 (1967–1968) "> Victor Pemberton was script editor for The Tomb of the Cybermen, with Peter Bryant as producer. After this, Bryant resumed the role of script editor, with Innes Lloyd returning as producer, until The Web of Fear when Bryant took over from Lloyd as producer. Derrick Sherwin replaced Bryant as script editor at the same time.

No	Title	Code	Episodes	Writer	Director	Original airdate
037	The Tomb of the Cybermen	MM	4 episodes	Kit Pedler & Gerry Davis	Morris Barry	2–23 September 1967
038	The Abominable Snowmen	NN	6 episodes (episodes 1 & 3-6 missing)	Mervyn Haisman & Henry Lincoln	Gerald Blake	30 September – 4 November 1967
039	The Ice Warriors	OO	6 episodes (episodes 2 & 3 missing)	Brian Hayles	Derek Martinus	11 November – 16 December 1967
040	The Enemy of the World	PP	6 episodes (episodes 1-2 & 4-6 missing)	David Whitaker	Barry Letts	23 December 1967 – 27 January 1968
041	The Web of Fear	QQ	6 episodes (episodes 2-6 missing)	Mervyn Haisman and Henry Lincoln	Douglas Camfield	3 February – 9 March 1968
042	Fury from the Deep	RR	6 episodes (all missing)	Victor Pemberton	Hugh David	16 March – 20 April 1968
043	The Wheel in Space	SS	6 episodes (episodes 1-2 & 4-5 missing)	David Whitaker and Kit Pedler	Tristan de Vere Cole	27 April – 1 June 1968

Season 6 (1968–1969)

<span class="anchor" id="Season 6 (1968–1969) "> Terrance Dicks took over from Derrick Sherwin as script editor from The Invasion, with Sherwin resuming the role for The Space Pirates. Derrick Sherwin took over as producer from Peter Bryant for The War Games.

No	Title	Code	Episodes	Writer	Director	Original airdate
044	The Dominators	TT	5 episodes	Norman Ashby (aka Mervyn Haisman & Henry Lincoln)	Morris Barry	10 August – 7 September 1968
045	The Mind Robber	UU	5 episodes	Peter Ling (and Derrick Sherwin)	David Maloney	14 September – 12 October 1968
046	The Invasion	VV	8 episodes (episodes 1 & 4 missing)	Derrick Sherwin and Kit Pedler	Douglas Camfield	2 November – 21 December 1968
047	The Krotons	WW	4 episodes	Robert Holmes	David Maloney	28 December 1968 – 18 January 1969
048	The Seeds of Death	XX	6 episodes	Brian Hayles (and Terrance Dicks)	Michael Ferguson	25 January – 1 March 1969
049	The Space Pirates	YY	6 episodes (episodes 1 & 3-6 missing)	Robert Holmes	Michael Hart	8 March – 12 April 1969
050	The War Games	ZZ	10 episodes	Malcolm Hulke & Terrance Dicks	David Maloney	19 April – 21 June 1969

Third Doctor

The Third Doctor was portrayed by Jon Pertwee. Sentenced to exile on Earth and forcibly regenerated at the end of The War Games, the Doctor spends his time working for UNIT. After The Three Doctors, The Time Lords repeal his exile, however the Doctor still worked closely with UNIT from time to time.

Season 7 (1970)

Barry Letts took over as producer from Derrick Sherwin after Spearhead from Space. From this season onwards the programme was produced in colour, although some episodes now exist only in black and white.

No	Title	Code	Episodes	Writer	Director	Original airdate
051	Spearhead from Space	AAA	4 episodes	Robert Holmes	Derek Martinus	3–24 January 1970
052	Doctor Who and the Silurians aka The Silurians	BBB	7 episodes	Malcolm Hulke	Timothy Combe	31 January – 14 March 1970
053	The Ambassadors of Death	CCC	7 episodes (Parts exist in black and white only)	David Whitaker, (and Trevor Ray and Malcolm Hulke)	Michael Ferguson	21 March–2 May 1970
054	Inferno	DDD	7 episodes	Don Houghton	Douglas Camfield & Barry Letts	9 May–20 June 1970

Season 8 (1971)

This season forms a loose arc with the introduction of the Master, who is the villain in each of the season's storylines.

No	Title	Code	Episodes	Writer	Director	Original airdate
055	Terror of the Autons	EEE	4 episodes	Robert Holmes	Barry Letts	2–23 January 1971
056	The Mind of Evil	FFF	6 episodes (Exists in black and white)	Don Houghton	Timothy Combe	30 January–6 March 1971
057	The Claws of Axos	GGG	4 episodes	Bob Baker & Dave Martin	Michael Ferguson	13 March–3 April 1971
058	Colony in Space	HHH	6 episodes	Malcolm Hulke	Michael E. Briant	10 April–15 May 1971
059	The Dæmons	JJJ	5 episodes	Guy Leopold (a.k.a. Robert Sloman and Barry Letts)	Christopher Barry	22 May–19 June 1971

Season 9 (1972)

No	Title	Code	Episodes	Writer	Director	Original airdate
060	Day of the Daleks	KKK	4 episodes	Louis Marks	Paul Bernard	1–22 January 1972
061	The Curse of Peladon	MMM	4 episodes	Brian Hayles	Lennie Mayne	29 January–19 February 1972
062	The Sea Devils	LLL	6 episodes	Malcolm Hulke	Michael Briant	26 February–1 April 1972
063	The Mutants	NNN	6 episodes	Bob Baker and Dave Martin	Christopher Barry	8 April–13 May 1972
064	The Time Monster	OOO	6 episodes	Robert Sloman (and Barry Letts)	Paul Bernard	20 May–24 June 1972

Season 10 (1972–73)

No	Title	Code	Episodes	Writer	Director	Original airdate
065	The Three Doctors[c]	RRR	4 episodes	Bob Baker and Dave Martin	Lennie Mayne	30 December 1972–20 January 1973
066	Carnival of Monsters	PPP	4 episodes	Robert Holmes	Barry Letts	27 January–17 February 1973
067	Frontier in Space	QQQ	6 episodes	Malcolm Hulke	Paul Bernard	24 February–31 March 1973
068	Planet of the Daleks	SSS	6 episodes[d]	Terry Nation	David Maloney	7 April–12 May 1973
069	The Green Death	TTT	6 episodes	Robert Sloman (and Barry Letts)	Michael Briant	19 May–23 June 1973

Season 11 (1973–74)

No	Title	Code	Episodes	Writer	Director	Original airdate
070	The Time Warrior	UUU	4 episodes	Robert Holmes	Alan Bromly	15 December 1973-5 January 1974
071	Invasion of the Dinosaurs [e]	WWW	6 episodes (Episode 1 exists only in black and white)	Malcolm Hulke	Paddy Russell	12 January–16 February 1974
072	Death to the Daleks	XXX	4 episodes	Terry Nation	Michael Briant	23 February–16 March 1974
073	The Monster of Peladon	YYY	6 episodes	Brian Hayles	Lennie Mayne	23 March–27 April 1974
074	Planet of the Spiders	ZZZ	6 episodes	Robert Sloman (and Barry Letts)	Barry Letts	4 May–8 June 1974

Fourth Doctor

The Fourth Doctor was portrayed by Tom Baker, and is to date the longest-serving Doctor, having held the role for seven seasons.

Season 12 (1974–75)

Barry Letts served as producer for Robot, after which he was succeeded by Philip Hinchcliffe. Robert Holmes took over from Terrance Dicks as script editor. 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.

No	Title	Code	Episodes	Writer	Director	Review
075	Robot	4A	4 episodes	Terrance Dicks	Christopher Barry	Yet to be viewed
076	The Ark in Space	4C	4 episodes	Robert Holmes (and John Lucarotti)	Rodney Bennett	After a rather boring first episode, the story picks up speed and is a solid, though unremarkable, episode.
077	The Sontaran Experiment	4B	2 episodes	Bob Baker & Dave Martin	Rodney Bennett	A nice bit of filler here. It's entertaining and continues the arc, but it lacks substance.
078	Genesis of the Daleks	4E	6 episodes	Terry Nation	David Maloney	A classic. Tis the season's best.
079	Revenge of the Cybermen	4D	4 episodes	Gerry Davis	Michael Briant	Most generic episode ever. Horrible clunker.

Season 13 (1975–76)

No	Title	Code	Episodes	Writer	Director	Original airdate
080	Terror of the Zygons	4F	4 episodes	Robert Banks Stewart	Douglas Camfield	30 August–20 September 1975
081	Planet of Evil	4H	4 episodes	Louis Marks	David Maloney	27 September–18 October 1975
082	Pyramids of Mars	4G	4 episodes	Stephen Harris (a.k.a. Robert Holmes and Lewis Greifer)	Paddy Russell	25 October–15 November 1975
083	The Android Invasion	4J	4 episodes	Terry Nation	Barry Letts	22 November–13 December 1975
084	The Brain of Morbius	4K	4 episodes	Robin Bland (a.k.a. Terrance Dicks and Robert Holmes)	Christopher Barry	3–24 January 1976
085	The Seeds of Doom	4L	6 episodes	Robert Banks Stewart	Douglas Camfield	31 January–6 March 1976

Season 14 (1976–77)

No	Title	Code	Episodes	Writer	Director	Original airdate
086	The Masque of Mandragora	4M	4 episodes	Louis Marks	Rodney Bennett	4–25 September 1976
087	The Hand of Fear	4N	4 episodes	Bob Baker & Dave Martin	Lennie Mayne	2–23 October 1976
088	The Deadly Assassin	4P	4 episodes	Robert Holmes	David Maloney	30 October–20 November 1976
089	The Face of Evil	4Q	4 episodes	Chris Boucher	Pennant Roberts	1–22 January 1977
090	The Robots of Death	4R	4 episodes	Chris Boucher	Michael Briant	29 January–19 February 1977
091	The Talons of Weng-Chiang	4S	6 episodes	Robert Holmes (and Robert Banks Stewart)	David Maloney	26 February–2 April 1977

Season 15 (1977–78)

Graham Williams took over as producer from Philip Hinchcliffe. Robert Holmes was replaced as script editor by Anthony Read, during The Sun Makers.

No	Title	Code	Episodes	Writer	Director	Original airdate
092	Horror of Fang Rock	4V	4 episodes	Terrance Dicks	Paddy Russell	3–24 September 1977
093	The Invisible Enemy	4T	4 episodes	Bob Baker & Dave Martin	Derrick Goodwin	1–22 October 1977
094	Image of the Fendahl	4X	4 episodes	Chris Boucher	George Spenton-Foster	29 October–19 November 1977
095	The Sun Makers	4W	4 episodes	Robert Holmes	Pennant Roberts	26 November–17 December 1977
096	Underworld	4Y	4 episodes	Bob Baker & Dave Martin	Norman Stewart	7–28 January 1978
097	The Invasion of Time	4Z	6 episodes	David Agnew (a.k.a. Graham Williams and Anthony Read)	Gerald Blake	4 February–11 March 1978

Season 16 (1978–79)

Douglas Adams took over as script editor from Anthony Read for The Armageddon Factor. 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.

No	Title	Code	Episodes	Writer	Director	Original airdate
098	The Ribos Operation	5A	4 episodes	Robert Holmes	George Spenton-Foster	2–23 September 1978
099	The Pirate Planet	5B	4 episodes	Douglas Adams	Pennant Roberts	30 September–21 October 1978
100	The Stones of Blood	5C	4 episodes	David Fisher	Darrol Blake	28 October–18 November 1978
101	The Androids of Tara	5D	4 episodes	David Fisher	Michael Hayes	25 November–16 December 1978
102	The Power of Kroll	5E	4 episodes	Robert Holmes	Norman Stewart	23 December 1978–13 January 1979
103	The Armageddon Factor	5F	6 episodes	Bob Baker and Dave Martin	Michael Hayes	20 January–24 February 1979

Season 17 (1979–80)

No	Title	Code	Episodes	Writer	Director	Original airdate
104	Destiny of the Daleks	5J	4 episodes	Terry Nation	Ken Grieve	1–22 September 1979
105	City of Death	5H	4 episodes	David Agnew (a.k.a. Douglas Adams, Graham Williams, and David Fisher)	Michael Hayes	29 September–20 October 1979
106	The Creature from the Pit	5G	4 episodes	David Fisher	Christopher Barry	27 October–17 November 1979
107	Nightmare of Eden	5K	4 episodes	Bob Baker	Alan Bromly	24 November–15 December 1979
108	The Horns of Nimon	5L	4 episodes	Anthony Read	Kenny McBain	22 December 1979–12 January 1980
—	Shada[f]	5M	6 episodes	Douglas Adams	Pennant Roberts	Unaired

Season 18 (1980–81)

John Nathan-Turner replaced Graham Williams as producer. Barry Letts returned, as executive producer, for just this season. Christopher H. Bidmead replaced Douglas Adams as script editor. 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 Circle, State of Decay, and Warriors' Gate trace the Doctor's adventures in E-Space; they were released as VHS and DVDs set with the umbrella title The E-Space Trilogy.

No	Title	Code	Episodes	Writer	Director	Original airdate
109	The Leisure Hive	5N	4 episodes	David Fisher	Lovett Bickford	30 August–20 September 1980
110	Meglos	5Q	4 episodes	John Flanagan and Andrew McCulloch	Terence Dudley	27 September–18 October 1980
111	Full Circle	5R	4 episodes	Andrew Smith	Peter Grimwade	25 October–15 November 1980
112	State of Decay	5P	4 episodes	Terrance Dicks	Peter Moffatt	22 November–13 December 1980
113	Warriors' Gate	5S	4 episodes	Stephen Gallagher	Paul Joyce & Graeme Harper	3–24 January 1981
114	The Keeper of Traken	5T	4 episodes	Johnny Byrne	John Black	31 January–21 February 1981
115	Logopolis	5V	4 episodes	Christopher H. Bidmead	Peter Grimwade	28 February–21 March 1981

Fifth Doctor

The Fifth Doctor was portrayed by Peter Davison.

Season 19 (1982)

Antony Root took over from Bidmead as script editor for Four to Doomsday and The Visitation, after which he was replaced by Eric Saward. The show moved from its traditional once-weekly Saturday broadcast to being broadcast twice-weekly on Monday and Tuesday.

Castrovalva, together with the previous two serials, The Keeper of Traken and Logopolis, form a loose trilogy involving the return of the Master. They were released on DVD under the banner title New Beginnings.

No	Title	Code	Episodes	Writer	Director	Original airdate
116	Castrovalva	5Z	4 episodes	Christopher H. Bidmead	Fiona Cumming	4–12 January 1982
117	Four to Doomsday	5W	4 episodes	Terence Dudley	John Black	18–26 January 1982
118	Kinda	5Y	4 episodes	Christopher Bailey	Peter Grimwade	1–9 February 1982
119	The Visitation	5X	4 episodes	Eric Saward	Peter Moffatt	15–23 February 1982
120	Black Orchid	6A	2 episodes	Terence Dudley	Ron Jones	1–2 March 1982
121	Earthshock	6B	4 episodes	Eric Saward	Peter Grimwade	8–16 March 1982
122	Time-Flight	6C	4 episodes	Peter Grimwade	Ron Jones	22–30 March 1982

Season 20 (1983)

To commemorate the twentieth season, the stories in this season involve the return of previous villains. Mawdryn Undead, Terminus and Enlightenment involve the Black Guardian's plot to kill the Doctor; they were released individually on VHS as parts of The Black Guardian Trilogy.

No	Title	Code	Episodes	Writer	Director	Original airdate
123	Arc of Infinity	6E	4 episodes	Johnny Byrne	Ron Jones	3–12 January 1983
124	Snakedance	6D	4 episodes	Christopher Bailey	Fiona Cumming	18–26 January 1983
125	Mawdryn Undead	6F	4 episodes	Peter Grimwade	Peter Moffatt	1–9 February 1983
126	Terminus	6G	4 episodes	Stephen Gallagher	Mary Ridge	15–23 February 1983
127	Enlightenment	6H	4 episodes	Barbara Clegg	Fiona Cumming	1–9 March 1983
128	The King's Demons	6J	2 episodes	Terence Dudley	Tony Virgo	15–16 March 1983

Special (1983)

No	Title	Code	Episodes	Writer	Director	Original airdate
20th Anniversary Special
129	The Five Doctors[g]	6K	90-minute special	Terrance Dicks	Peter Moffatt	23 November 1983

Season 21 (1984)

No	Title	Code	Episodes	Writer	Director	Original airdate
130	Warriors of the Deep	6L	4 episodes	Johnny Byrne	Pennant Roberts	5–13 January 1984
131	The Awakening	6M	2 episodes	Eric Pringle	Michael Owen Morris	19–20 January 1984
132	Frontios	6N	4 episodes	Christopher H. Bidmead	Ron Jones	26 January–3 February 1984
133	Resurrection of the Daleks	6P	2 episodes (45 minutes each)[h]	Eric Saward	Matthew Robinson	8–15 February 1984
134	Planet of Fire	6Q	4 episodes	Peter Grimwade	Fiona Cumming	23 February–2 March 1984
135	The Caves of Androzani	6R	4 episodes	Robert Holmes	Graeme Harper	8–16 March 1984

Sixth Doctor

The Sixth Doctor was portrayed by Colin Baker.

Season 21 (1984) — continued

No	Title	Code	Episodes	Writer	Director	Original airdate
136	The Twin Dilemma	6S	4 episodes	Anthony Steven	Peter Moffatt	22–30 March 1984

Season 22 (1985)

The series moved back to Saturday broadcasts. All episodes were 45 minutes long, though all of the episodes also exist in 25-minute versions.

No	Title	Code	Episodes	Writer	Director	Original airdate
137	Attack of the Cybermen	6T	2 episodes	Paula Moore	Matthew Robinson	5–12 January 1985
138	Vengeance on Varos	6V	2 episodes	Philip Martin	Ron Jones	19–26 January 1985
139	The Mark of the Rani	6X	2 episodes	Pip and Jane Baker	Sarah Hellings	2–9 February 1985
140	The Two Doctors	6W	3 episodes	Robert Holmes	Peter Moffatt	16 February–2 March 1985
141	Timelash	6Y	2 episodes	Glen McCoy	Pennant Roberts	9–16 March 1985
142	Revelation of the Daleks	6Z	2 episodes	Eric Saward	Graeme Harper	23–30 March 1985

Season 23 (1986)

Main article: The Trial of a Time Lord

After an 18-month production hiatus, the series returned. Eric Saward was script editor up to part eight, when Nathan-Turner unofficially took over script editing the remainder of the season because of Saward's departure. The whole season is titled as The Trial of a Time Lord, and is split into four segments. Episode length returned to 25 minutes, but with only fourteen episodes, making this season approximately half the length of the previous fifteen seasons.

No	Title	Code	Episodes	Writer	Director	Original airdate
143	The Mysterious Planet	7A	4 episodes	Robert Holmes	Nicholas Mallett	6–27 September 1986
	Mindwarp	7B	4 episodes	Philip Martin	Ron Jones	4–25 October 1986
	Terror of the Vervoids	7C	4 episodes	Pip and Jane Baker	Chris Clough	1–22 November 1986
	The Ultimate Foe	7C	2 episodes (Episode 2 is 30 minutes)	Robert Holmes and Pip and Jane Baker	Chris Clough	29 November–6 December 1986

Seventh Doctor

The Seventh Doctor was portrayed by Sylvester McCoy.

Season 24 (1987)

Andrew Cartmel took over as script editor.

No	Title	Code	Episodes	Writer	Director	Original airdate
144	Time and the Rani	7D	4 episodes	Pip and Jane Baker	Andrew Morgan	7–28 September 1987
145	Paradise Towers	7E	4 episodes	Stephen Wyatt	Nicholas Mallett	5–26 October 1987
146	Delta and the Bannermen	7F	3 episodes	Malcolm Kohll	Chris Clough	2–16 November 1987
147	Dragonfire	7G	3 episodes	Ian Briggs	Chris Clough	23 November–7 December 1987

Season 25 (1988-89)

No	Title	Code	Episodes	Writer	Director	Original airdate
148	Remembrance of the Daleks	7H	4 episodes	Ben Aaronovitch	Andrew Morgan	5–26 October 1988
149	The Happiness Patrol	7L	3 episodes	Graeme Curry	Chris Clough	2–16 November 1988
150	Silver Nemesis	7K	3 episodes	Kevin Clarke	Chris Clough	23 November–7 December 1988
151	The Greatest Show in the Galaxy	7J	4 episodes	Stephen Wyatt	Alan Wareing	14 December 1988–4 January 1989

Season 26 (1989)

The final season continued to push the series towards a darker approach, focusing this time more on Ace's personal life as well as The Doctor's past and manipulations. This season sets the tone for the Virgin New Adventures novels that follow.

No	Title	Code	Episodes	Writer	Director	Original airdate
152	Battlefield	7N	4 episodes	Ben Aaronovitch	Michael Kerrigan	6–27 September 1989
153	Ghost Light	7Q	3 episodes	Marc Platt	Alan Wareing	4–18 October 1989
154	The Curse of Fenric	7M	4 episodes	Ian Briggs	Nicholas Mallett	25 October–15 November 1989
155	Survival	7P	3 episodes	Rona Munro	Alan Wareing	22 November–6 December 1989