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Season guide

Doctor Who: Season 6

44 episodes Premiered Aug 10, 1968 Updated Sep 25, 2026

This season featured the first ever UNIT story, The Invasion, which showcased the return of Brigadier Lethbridge-Stewart. It also featured the first official appearance of Time Lords and the as yet unnamed Doctor's home planet (another member of Susan and the Doctor's race, the Monk, had appeared previously, but without much elaboration and without using the term "Time Lord"). It also marked the tenure of Patrick Tro

Previously on Doctor Who

Season 6 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Directly follows the overarching narrative developments of Doctor Who Season 5.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.

Season overview

This season featured the first ever UNIT story, The Invasion, which showcased the return of Brigadier Lethbridge-Stewart. It also featured the first official appearance of Time Lords and the as yet unnamed Doctor's home planet (another member of Susan and the Doctor's race, the Monk, had appeared previously, but without much elaboration and without using the term "Time Lord"). It also marked the tenure of Patrick Troughton as the Second Doctor. It consisted of seven serials and forty-four episodes, including two epic-length storylines: the eight episodes of The Invasion and the ten-episode The War Games.

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Season 6 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 6 Progress Shield

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Binge Efficiency Engine

Season 6: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

93%
Mytharc (3): Crucial lore & season climaxes
Core (41): Character development & subplots
Side Quest (0): Standalone / filler
S6·E1 Mytharc

The Dominators (1)

Aug 10, 1968 · 25 min

The TARDIS arrives on the planet Dulkis where the Doctor, Zoe and Jamie decide to have a quiet holiday. Only to find the Evil Dominators and their robotic slaves, The Quarks have a

S6·E2 Core

The Dominators (2)

Aug 17, 1968 · 25 min

The Doctor and Jamie are captured by the Dominators, who subject them to an intelligence test, while Zoe and Cully attempt to convince the Dulcian council of the threat.

S6·E3 Core

The Dominators (3)

Aug 24, 1968 · 25 min

Zoe and Cully are captured by the Dominators and put to work alongside the survey team while the Doctor and Jamie decide to return to the island to help.

S6·E4 Core

The Dominators (4)

Aug 31, 1968 · 24 min

The Doctor and Zoe are interrogated by Rago, who is planning to present his terms to the Dulcian council, while Jamie and Cully try to find a way to strike back against the Quarks.

S6·E5 Core

The Dominators (5)

Sep 7, 1968 · 25 min

Jamie and Cully manage to rescue the Doctor's party and together they try to find a way to stop the Dominators before they destroy the entire planet.

S6·E6 Core

The Mind Robber (1)

Sep 14, 1968 · 22 min

The TARDIS arrives in a white void, having made an emergency take-off to escape the volcanic eruption on Dulkis. The Doctor, Jamie and Zoe find themselves in the Land of Fiction, w

S6·E7 Core

The Mind Robber (2)

Sep 21, 1968 · 22 min

With the TARDIS destroyed, the Doctor, Jamie and Zoe find themselves in a strange forest patrolled by mysterious soldiers.

S6·E8 Core

The Mind Robber (3)

Sep 28, 1968 · 20 min

The Doctor realises that the travellers are trapped in a world where fiction is real and where creatures are a threat if people believe in them.

S6·E9 Core

The Mind Robber (4)

Oct 5, 1968 · 20 min

The Doctor, Jamie and Zoe reach the citadel at the centre of the land, where they finally encounter the Master of the Land of Fiction.

S6·E10 Core

The Mind Robber (5)

Oct 12, 1968 · 18 min

With Jamie and Zoe having been turned into fiction, the Doctor must find a way to save them without suffering the same fate or becoming part of the Master Brain.

S6·E11 Core

The Invasion (1)

Nov 2, 1968 · 24 min

The Doctor and the newly formed UNIT must stop a Cybermen Invasion and a Sinister Industrialist in league with them

S6·E12 Core

The Invasion (2)

Nov 9, 1968 · 25 min

The Doctor and Jamie are taken prisoner by their mysterious observers and have a reunion with an old friend while Zoe and Isobel carry out their own investigation of IE.

S6·E13 Core

The Invasion (3)

Nov 16, 1968 · 24 min

The Doctor and Jamie return to the IE factory in search of Zoe and Isobel, where they meet with Professor Watkins and fall foul of Vaughn.

S6·E14 Core

The Invasion (4)

Nov 23, 1968 · 24 min

The Doctor and Jamie enlist the help of UNIT to rescue Zoe and Isobel before trying to find out what Vaughn is really up to.

S6·E15 Core

The Invasion (5)

Nov 30, 1968 · 24 min

The Doctor and Jamie tell the Brigadier about the Cybermen but with Rutledge under Vaughn's control he is powerless to act.

S6·E16 Core

The Invasion (6)

Dec 7, 1968 · 24 min

Captain Turner manages to rescue Jamie and the others, while the Doctor begins working on a way to protect everyone from the Cybermen's hypno-sound signal.

S6·E17 Core

The Invasion (7)

Dec 14, 1968 · 25 min

With the entire world unconscious apart from the Doctor and his friends, the Cybermen are poised to invade and only Zoe, the Brigadier and a missile crew can stop them.

S6·E18 Core

The Invasion (8)

Dec 21, 1968 · 24 min

The Cybermen have launched their deadly megatron bomb which will destroy all life on Earth unless the Doctor can deactivate the homing signal.

S6·E19 Core

The Krotons (1)

Dec 28, 1968 · 23 min

When the TARDIS arrives on the planet of the Gonds, the Doctor, Jamie and Zoe discover a world ruled and enslaved by the Krotons. The brightest Gonds are always chosen to serve as

S6·E20 Core

The Krotons (2)

Jan 4, 1969 · 24 min

Zoe is selected as a companion for the Krotons and the Doctor insists on joining her.

S6·E21 Core

The Krotons (3)

Jan 11, 1969 · 22 min

Jamie is held prisoner by the Krotons who intend to recapture the Doctor and Zoe for their mental energy.

S6·E22 Core

The Krotons (4)

Jan 18, 1969 · 23 min

Selris succeeds in drawing the Krotons out of the Dynatrope but Eelek agrees to hand the Doctor and Zoe over to them in return for their leaving the planet.

S6·E23 Core

The Seeds of Death (1)

Jan 25, 1969 · 25 min

21st century Earth is entirely dependent on the T-Mat transport system but the control centre on the moon has stopped functioning. Meanwhile, the Doctor, Jamie and Zoe meet the one

S6·E24 Core

The Seeds of Death (2)

Feb 1, 1969 · 25 min

Eldred agrees to supply a rocket for travel to the moon and the Doctor, Jamie and Zoe volunteer to crew it.

S6·E25 Core

The Seeds of Death (3)

Feb 8, 1969 · 25 min

The Doctor, Jamie and Zoe make it to the moon and join forces with Phipps but the Ice Warriors have gained control of T-mat.

S6·E26 Core

The Seeds of Death (4)

Feb 15, 1969 · 25 min

The Ice Warriors' seed pods beginning materialising all over the globe while Slaar decides to kill the Doctor by T-matting him into space.

S6·E27 Core

The Seeds of Death (5)

Feb 22, 1969 · 25 min

The Doctor and his allies manage to return to Earth via T-mat only to find the Ice Warrior has attacked the weather control station.

S6·E28 Core

The Seeds of Death (6)

Mar 1, 1969 · 25 min

The Doctor manages to create a rain storm to destroy the Martian fungus before trying to find a way to stop the Ice Warriors' invasion fleet.

S6·E29 Core

The Space Pirates (1)

Mar 8, 1969 · 25 min

Space beacons are being destroyed by pirates, who are salvaging the argonite metal. When the Doctor, Jamie and Zoe arrive on one of the beacons, they are mistaken for pirates.

S6·E30 Core

The Space Pirates (2)

Mar 15, 1969 · 25 min

With the Doctor, Jamie and Zoe trapped on a beacon segment, Hermack becomes suspicious of the unruly prospector Milo Clancey.

S6·E31 Core

The Space Pirates (3)

Mar 22, 1969 · 25 min

The Doctor, Jamie and Zoe flee from the Space Corps with Clancey, who decides to seek refuge on Ta.

S6·E32 Core

The Space Pirates (4)

Mar 29, 1969 · 25 min

The Doctor, Jamie and Zoe are held prisoner by the space pirates while Caven comes up with a plan to throw suspicion onto Clancey.

S6·E33 Core

The Space Pirates (5)

Apr 5, 1969 · 25 min

Madeleine is revealed to be working with Caven, who comes up with a way to kill the Doctor and his friends whilst framing them for the piracy.

S6·E34 Core

The Space Pirates (6)

Apr 12, 1969 · 25 min

With Clancey and Issigri trapped aboard the LIZ, the Doctor, Jamie and Zoe try to convince Madeleine to help them before Caven destroys Ta.

S6·E35 Core

The War Games (1)

Apr 19, 1969 · 26 min

The Doctor, Jamie and Zoe realise they have arrived in the trenches of the First World War, where the sinister General Smythe accuses them of espionage.

S6·E36 Core

The War Games (2)

Apr 26, 1969 · 25 min

The Doctor and Zoe manage to escape from Ransom and attempt to rescue Jamie from the military prison.

S6·E37 Core

The War Games (3)

May 3, 1969 · 24 min

The Doctor and his friends realise the area is divided into different time zones and decide to return to the château to obtain a map from Smythe.

S6·E38 Core

The War Games (4)

May 10, 1969 · 23 min

The Doctor and Zoe are transported to the control centre of the war games while Jamie and Lady Jennifer fall foul of American Revolution soldiers.

S6·E39 Core

The War Games (5)

May 17, 1969 · 25 min

The Doctor attempts to rescue Zoe and Carstairs while Jamie and Lady Jennifer try to convince the resistance of the true nature of Von Weich and the others.

S6·E40 Core

The War Games (6)

May 24, 1969 · 23 min

The scientist examines the captured resistance fighters and realises Jamie is a new arrival on the planet while the Doctor, Zoe and Carstairs try to rescue their friends.

S6·E41 Core

The War Games (7)

May 31, 1969 · 23 min

The Doctor, Jamie and Carstairs manage to return to the 1917 zone only to be captured by Smythe, who orders the Doctor executed.

S6·E42 Core

The War Games (8)

Jun 7, 1969 · 25 min

The Doctor and the processing machine have been taken by the Aliens but the resistance are making plans to attack the control centre.

S6·E43 Mytharc

The War Games (9)

Jun 14, 1969 · 25 min

To prove his loyalty to the Aliens, the Doctor is ordered to reprocess his friends while the Security Chief finally uncovers evidence of the War Chief's treachery.

S6·E44 Mytharc

The War Games (10)

Jun 21, 1969 · 25 min

The TARDIS is drawn to the planet of the Time Lords where both the Doctor and the War Lord are placed on trial.

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