Season 15 Plot

This season introduced K9 to the series and saw the departure of Leela. It was originally intended to include Terrance Dicks' story The Vampire Mutations but, due to a major BBC production of Dracula, it was postponed. It later became Season 18's State of Decay. To replace it, Dicks quickly scripted the season opener, Horror of Fang Rock. The season took a two week transmission break over the 1977 Christmas period, between the broadcast of part four of The Sun Makers and part one of Underworld.

Doctor Who Season 15 aired on September 3rd, 1977.

Watch 'Doctor Who' Season 15 Online

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Season 15 Episodes

73

1. Horror of Fang Rock (1)

September 3rd, 197725 min

The English channel, the 1900s AD. The TARDIS lands on barren Fang Rock, inhabited until now only by three lighthouse keepers. But what is the strange fog covering the island, and can it be connected to the falling star sighted earlier that night?

67

2. Horror of Fang Rock (2)

September 10th, 197725 min

The survivors of a wrecked ship are stranded with the lighhouse crew on Fang Rock as a deadly menace slithers through the fog. Has the Beast of Fang Rock returned?

68

3. Horror of Fang Rock (3)

September 17th, 197725 min

The Doctor barricades everyone in the lighthouse to protect them from the mysterious deadly creature in the fog. But it may already be inside, biding its time…

67

4. Horror of Fang Rock (4)

September 24th, 197725 min

The Rutan starts picking off the surviving humans one by one as the Doctor and Leela struggle to defeat not only the alien but an entire fleet waiting to occupy Earth.

63

5. The Invisible Enemy (1)

October 1st, 197725 min

Deep space, 5000AD. An Earth supply shuttle is infected by a strange sentient space-borne virus, which quickly spreads to the crew of the refuelling station on the moon Titan. Even worse, the Doctor himself falls victim. But why is Leela immune, and what is the virus's ultimate goal?

63

6. The Invisible Enemy (2)

October 8th, 197725 min

Leela and Lowe take the Doctor to the Bi-Al Foundation for help. But how can they cure an infection of the mind?

67

7. The Invisible Enemy (3)

October 15th, 197725 min

Miniaturised clones of the Doctor and Leela are injected into his brain. But they must now fight the virus on its own level. And its servants are closing in around them.

67

8. The Invisible Enemy (4)

October 22nd, 197725 min

The Nucleus, now grown to human size, is determined to spawn and take over the Galaxy. Only the Doctor and Leela can stop it.

60

9. Image of the Fendahl (1)

October 29th, 197725 min

England, the late 1970s. At Fetch Priory, Dr Fendelman's experiments with the new Time Scanner are disrupted by the mysterious death of a hiker, nearby. Then there's the mysterious skull, also being used as part of his work. A skull that seems to predate the evolution of mankind. What is the true role of the Fendahl in humanity's evolution?

53

10. Image of the Fendahl (2)

November 5th, 197725 min

The mystery surrounding the strange skull deepens. Thea is slowly succumbing to its influence while the Doctor prepares to battle a creature from mythology.

60

11. Image of the Fendahl (3)

November 12th, 197725 min

While Max prepares to tap supernatural forces beyond imagining, the Doctor and Leela investigate the legend of the Fendahl.

60

12. Image of the Fendahl (4)

November 19th, 197725 min

The Fendahl is returning to life, ready to consume everything in its path. Can the Doctor find a way to kill death itself?

65

13. The Sun Makers (1)

November 26th, 197725 min

Pluto, the distant future. The planet has been terraformed and is now orbited by artificial suns, provided by the rapacious company who ruthlessly exploit the relocated human workforce. The Doctor, Leela, and K9 arrive and befriend a luckless drone worker, but they must flee with him to the dark undercity...

60

14. The Sun Makers (2)

December 3rd, 197725 min

The Doctor has been captured by the Gatherer. Leela works to free him but the Gatherer is already laying his own plans…

67

15. The Sun Makers (3)

December 10th, 197725 min

Now Leela is the prisoner of the Collector. He knows of the Doctor and is determined to rid himself of both of them.

60

16. The Sun Makers (4)

December 17th, 197725 min

The Doctor now moves to completely overthrow the Company. But the Collector has one last trump card to play.

55

17. Underworld (1)

January 7th, 197825 min

Deep space, an unknown time. The Doctor encounters the Minyans, survivors of a race the Time Lords unwittingly obliterated early in their own history. The Minyans are searching for their race's lost gene banks, a quest which takes them to the edge of the galaxy…

60

18. Underworld (2)

January 14th, 197825 min

After 100,000 years, the Minyans have found the long-lost P7E. But what awaits them on the ship, long buried in the core of a newborn planet?

60

19. Underworld (3)

January 21st, 197825 min

The Minyans have, at long last, found the P7E. But a host of guards and robotic seers stand between them and the race banks.

60

20. Underworld (4)

January 28th, 197825 min

The Minyons struggle to gain the precious race banks from the Oracle. But perhaps it is giving in a little too easily ...

70

21. The Invasion of Time (1)

February 4th, 197825 min

Gallifrey, world of the Time Lords. The Doctor returns and claims the vacant presidency. But his behaviour is erratic and his motives mysterious.

70

22. The Invasion of Time (2)

February 11th, 197825 min

The Doctor is made president of the Time Lords. He immediately orders K-9 to lower the planet's defences and has Leela banished to the wilderness.

63

23. The Invasion of Time (3)

February 18th, 197825 min

The Doctor has betrayed his own people and enabled a Vardan invasion of Gallifrey. Leela joins forces with the Outsiders and prepares to strike back against the aliens.

63

24. The Invasion of Time (4)

February 25th, 197825 min

The Doctor works to free his planet of the Vardan menace. How can he defeat an enemy who can read his very thoughts? And does their invasion conceal a greater menace?

70

25. The Invasion of Time (5)

March 4th, 197825 min

The Sontarans have invaded Gallifrey, seeking to seize the incredible power of the Time Lords. The Doctor's first step is to cut them off from their fleet. But Kelner is helping the enemy…

70

26. The Invasion of Time (6)

March 11th, 197825 min

The Sontarans finally invade the TARDIS itself, seeking the Great Key. The Doctor, however, has other uses for this powerful object…

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Sep 3, 1977
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Season 13

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Aug 30, 1975
Season 12

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Dec 28, 1974
Season 11

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Dec 15, 1973
Season 10

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Dec 30, 1972
Season 9

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Jan 1, 1972
Season 8

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Jan 2, 1971
Season 7

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Jan 3, 1970
Season 6

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Aug 10, 1968
Season 5

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Sep 2, 1967
Season 4

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Season 3

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Season 2

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Season 1

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