Doctor Who: The Lost Stories (The Third Doctor)
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The Automata The Third Doctor
Writer: Robert Holmes Notes: Holmes was commissioned to write a storyline for “The Automata” on January 16th, 1973. It did not find favour with producer Barry Letts and script editor Terrance Dicks, however, and was rejected ten days later. Holmes was commissioned to write The Time Warrior instead.
Characters: The Third Doctor
Episodes: 4
Planned For: Season Eleven
Stage Reached: Storyline
Synopsis: Unknown
References: Doctor Who Magazine #246, DWM Special Edition #2

The Brain-Dead The Third Doctor
Writer: Brian Hayles Notes: This idea was submitted during the spring of 1971. It was rejected by script editor Terrance Dicks, but its inclusion of the Ice Warriors inspired the development of The Curse Of Peladon.
Characters: The Third Doctor, Jo, UNIT
Episodes: Unknown
Planned For: Season Nine
Stage Reached: Story idea
Synopsis: The Ice Warriors, led by Commander Kulvis, plan to invade modern-day Earth using a weapon called the ‘Z’ beam, which is capable of freezing anything it touches to absolute zero. In particular, the Ice Warriors can use it to freeze a human brain, turning the afflicted individual into a subservient Brain-Dead. The Ice Warriors hijack a communications satellite and use it to take over the crew of its receiving station, whom they set to work constructing a giant ‘Z’ beam transmitter. They plan to use the satellite network to broadcast the ‘Z’ beam around the world, enslaving mankind and adjusting the Earth's climate to something suitable for Martian habitation. Realising that metals are extremely conductive at absolute zero, the Doctor overloads the ‘Z’ beam transmitter just at the point of broadcast, destroying the Ice Warriors and the Brain-Dead.
References: Doctor Who: The Seventies, Nothing At The End Of The Lane #3

The Brain Drain see The Spare-Part People

The Cerebroids The Third Doctor
Writers: Charlotte and Dennis Plimmer Notes: Scripts for “The Cerebroids” were commissioned on June 24th, 1970. On the 29th, however, the serial was abruptly abandoned.
Characters: The Third Doctor (with Jo and UNIT?)
Episodes: Unknown
Planned For: Season Eight
Stage Reached: Storyline
Synopsis: Unknown
References: Doctor Who Magazine Special Edition #2

The Circles Of Power The Third Doctor
Writer: Brian Hayles Notes: “The Circles Of Power” was discovered by Mark Hayles amongst his late father's files.
Characters: The Third Doctor, Liz, UNIT
Episodes: Unknown
Planned For: Season Seven
Stage Reached: Storyline
Synopsis: A new communications satellite, designed by Sir Walter Llewellyn, is launched to link computers across Europe and America. However, it has been sabotaged by a radical scientist named Tilverton, who believes his inventions are being suppressed by commercial concerns. This precipitates an escalating number of computer-related incidents across the globe -- including the release of robotic “sensorspheres” which can induce amnesia in any person not wearing a special pendant. The pendant actually denotes membership in the Circles of Powers, a secret cabal led by Llewellyn and which has made a pawn of Tilverton. The Doctor discovers that Llewellyn plans to use the global chaos to ignite a third World War, and stops the evacuation of Government officials which would have triggered this stage of the plan. An orbital missile destroys the satellite, and when the Doctor inverts the sensorspheres' programming, the robots wipe the minds of Llewellyn and his co-conspirators.
References: Nothing At The End Of The Lane #3

The Daleks In London The Third Doctor
Writer: Robert Sloman Notes: For Season Nine, producer Barry Letts decided to bring back the Daleks, who had not starred in a Doctor Who story since The Evil Of The Daleks at the end of Season Four. The original vehicle for their return was to have been “The Daleks In London”, the storyline for which was commissioned from Sloman on May 25th, 1971, but Letts subsequently decided that the Daleks would be more effectively used in the season opener, Louis Marks' “Years Of Doom”. As such, Marks' story was rewritten as Day Of The Daleks while Sloman was asked to develop a new storyline under his original commission. This became The Time Monster.
Characters: The Third Doctor, Jo, UNIT
Episodes: 6
Planned For: Final story of Season Nine
Stage Reached: Storyline
Synopsis: Unknown
References: Doctor Who Magazine #268, DWM Special Edition #2

The Final Game The Third Doctor
Writer: Robert Sloman Notes: Created in response to Roger Delgado's desire for the Master to be written out of Doctor Who -- because his attachment to the programme was making it difficult for him to find other work -- a storyline for “The Final Game” was commissioned on February 15th, 1973, and was inspired in part by producer Barry Letts' interest in Eastern philosophy. “The Final Game” had to be abandoned when Delgado died in a car accident while filming in Turkey on June 18th. In its place, Sloman developed Planet Of The Spiders instead.
Characters: The Third Doctor, Sarah Jane
Episodes: 6
Planned For: The final serial of Season Eleven
Stage Reached: Storyline
Synopsis: The Doctor and the Master are revealed to be two aspects of the same person -- the Master representing the “id” (instinctual needs and desires) and the Doctor the “ego” (conscious perception of and adaptation to reality). The Master ultimately perishes in an explosion which saves the lives of the Doctor and others; it remains unclear if this was a final act of redemption on the villain's part.
References: Doctor Who Magazine #314

The Furies see The Space War

The Harvesters The Second Doctor The Third Doctor
aka The Vampire Planet
Writer: William Emms Notes: A couple of years after submitting this story under the title of “The Harvesters” for the Second Doctor, Emms redrafted it in 1969 as “The Vampire Planet” to adhere to the new UNIT format. “The Vampire Planet” may have briefly been considered for the final slot of Season Seven -- ultimately taken by Inferno -- but was soon dropped.
Characters: The Second Doctor (original submission); The Third Doctor, UNIT (resubmission)
Episodes: Unknown
Planned For: Troughton era (original submission); final story of Season Seven (resubmission)
Stage Reached: Storyline
Synopsis: The Masters pilot a purple planet into the solar system and despatch their Roboes to invade Earth. The Doctor defeats the Masters by frightening them with film of nuclear explosions.
References: Doctor Who Magazine #299, DWM Special Edition #2

The Hollow Men The Third Doctor
Writer: Brian Hayles Notes: “The Hollow Men” was discovered by Mark Hayles amongst his late father's files.
Characters: The Third Doctor, UNIT
Episodes: Unknown
Planned For: Unknown
Stage Reached: Storyline
Synopsis: Following the death of his wife from heart disease, the wealthy Sherman P Rayburn is determined to set up an institute to propel advances in medical science. However, his investments in this project have depleted his financial resources, and the government refuses to assist him. Enraged, Rayburn turns to a discovery made by one of his scientists, Professor Martin, who has found a way to turn a rabbit into a “negative” which can pass through normal, “positive” materials. Rayburn forces Martin to use the procedure to create a squad of commandos with which he can raid government treasuries. UNIT is helpless to stop them until, during their final assault on the Bank of England, the Doctor convinces the commandos that Rayburn has concealed the truth from them: the procedure is irreversible. The shadow squad turns on Rayburn and destroys him.
References: Nothing At The End Of The Lane #3

The Mega The Third Doctor
Writer: Bill Strutton Notes: In 1970, more than five years after completing The Web Planet, Strutton approached the Doctor Who office about writing for the series again. On September 25th, he submitted the storyline for “The Mega”, which was retroactively commissioned on October 19th. Although Strutton worked on the project for a number of weeks, the idea was eventually discarded. In December 2013, Big Finish Productions released an audio adaptation of “The Mega” by Simon Guerrier.
Characters: The Third Doctor, Jo
Episodes: 4
Planned For: Season Eight
Stage Reached: Storyline
Synopsis: Forthcoming
References: Doctor Who Magazine #286, DWM Special Edition #2

The Mists Of Madness The Third Doctor
Writer: Brian Wright Notes: Script editor Terrance Dicks commissioned the storyline from Wright on February 17th, 1969, and it was submitted on May 9th. Subsequently, however, Wright took up an academic writing post in Bristol, leaving him with no time to complete work on “The Mists Of Madness”, which was then dropped from the schedule.
Characters: The Third Doctor, Liz
Episodes: 7
Planned For: Final story of Season Seven
Stage Reached: Storyline
Synopsis: The Doctor discovers an artificially-created human community.
References: Doctor Who Magazine Special Edition #2

Multiface The Third Doctor
Writer: Godfrey Harrison Notes: This was an experimental storyline commissioned by producer Barry Letts on July 19th, 1971 while script editor Terrance Dicks was on holiday. Although considerable development was undertaken, Letts eventually decided that “Multiface” was turning out to be more fantastical than he felt appropriate for Doctor Who, and it was abandoned on February 25th, 1972.
Characters: The Third Doctor, Jo
Episodes: 4
Planned For: Seasons Nine or Ten
Stage Reached: Storyline
Synopsis: Unknown
References: Doctor Who Magazine Special Edition #2, Doctor Who: The Seventies

The Shadow People The Third Doctor
Writers: Charlotte and Dennis Plimmer Notes: The Plimmers submitted their storyline to the Doctor Who production office on November 10th, 1969 and it was given serious consideration for the final slot of Season Seven. However, a subsequent pay dispute with the Plimmers meant that “The Shadow People” was abandoned shortly thereafter.
Characters: The Third Doctor, Liz
Episodes: 7
Planned For: Final story of Season Seven
Stage Reached: Storyline
Synopsis: Unknown
References: Doctor Who Magazine Special Edition #2

The Shape Of Terror The Third Doctor
Writer: Brian Hayles Notes: This idea was submitted during the spring of 1971. It was rejected by script editor Terrance Dicks, but the idea of an Agatha Christie-style mystery was attractive and was incorporated into The Curse Of Peladon.
Characters: The Third Doctor, Jo
Episodes: Unknown
Planned For: Season Nine
Stage Reached: Storyline
Synopsis: A rescue team led by Commander Hallett is summoned to research station Pi Delta 6 on the planet Medusa Centaurus. Hallett arrives to find the station deserted, and his security officer, Garford, believes it has been attacked by pirates. Indeed, when the TARDIS brings the Doctor and Jo to Pi Delta 6, Garford accuses them of being associated with the pirates. In fact, the station has fallen victim to the Energid, a shapeshifting protoplasmic entity which can absorb people's brains. The Energid wishes to merge with the Doctor, but when the Energid attempts the fusion, the Doctor manages to rally the minds of those whom the Energid had previously consumed, and the creature is destroyed.
References: Doctor Who Magazine #219, Nothing At The End Of The Lane #3

The Space War The Third Doctor
aka The Furies
Writer: Ian Stuart Black Notes: Nearly four years after The Macra Terror, his last contribution to Doctor Who, Black was commissioned to write a storyline entitled “The Space War” (later changed to “The Furies”) on November 9th, 1970. Although Black delivered this toward the end of the month, it did not proceed to script form.
Characters: The Third Doctor
Episodes: 6
Planned For: Season Eight
Stage Reached: Storyline
Synopsis: Unknown
References: Doctor Who Magazine #308, DWM Special Edition #2

The Spare-Part People The Third Doctor
aka The Brain Drain, The Labyrinth
Writer: Jon Pertwee and Reed de Rouen Notes: Submitted around the summer of 1970, it does not appear that the storyline was seriously considered by the production team.
Characters: The Third Doctor
Episodes: 7
Planned For: Season Eight
Stage Reached: Storyline
Synopsis: The Doctor poses as Cambridge don Dr John Madden to investigate a spate of celebrity disappearances. He is kidnapped by mummy-like beings who take him to Antarctica, where a hidden civilisation exists. There the Doctor participates in brutal games and combats a monster which dwells in a labyrinth.
References: Doctor Who Magazine Special Edition #2

The Vampire Planet see The Harvesters

(untitled) The Third Doctor
Writer: Douglas Camfield Notes: Camfield, who had recently directed Inferno, submitted this in late 1970.
Characters: The Third Doctor
Episodes: Unknown
Planned For: Season Eight
Stage Reached: Storyline
Synopsis: Set in a hidden Amazon city.
References: Doctor Who Magazine Special Edition #2

(untitled) The Third Doctor
Writer: Trevor Ray Notes: Around the time that he became Doctor Who's assistant story editor in late 1968, Ray spent three days carrying out research on this story with the Marines. He eventually decided his idea was too technical to be accomplished in Doctor Who.
Characters: Presumably the Third Doctor
Episodes: Unknown
Planned For: Presumably Season Seven
Stage Reached: Story idea
Synopsis: Would have been set underwater.
References: Doctor Who Magazine Special Edition #4

(untitled) The Third Doctor
Writer: Martin Worth Notes: This was apparently considered in late 1970.
Characters: The Third Doctor
Episodes: Unknown
Planned For: Season Eight
Stage Reached: Story idea
Synopsis: Concerned plant life taking over the Earth.
References: Doctor Who Magazine Special Edition #2