• Air date: 03 Sep '77 26 episodes
      The fifteenth season of British science fiction television series Doctor Who began on 3 September 1977 with the episode Horror of Fang Rock, and ended with The Invasion of Time.
  • List of Episodes (26)
    • 1. Horror of Fang Rock, Part One

      03 Sep '77
      The English channel, the 1900s AD. The TARDIS lands on barren Fang Rock, inhabited until now only by three light-house keepers. But what is the strange fog covering the island, and can it be connected to the falling star sighted earlier that night?
    • 2. Horror of Fang Rock, Part Two

      10 Sep '77
      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?
    • 3. Horror of Fang Rock, Part Three

      17 Sep '77
      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…
    • 4. Horror of Fang Rock, Part Four

      24 Sep '77
      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.
    • 5. The Invisible Enemy, Part One

      01 Oct '77
      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?
    • 6. The Invisible Enemy, Part Two

      08 Oct '77
      Leela and Lowe take the Doctor to the Bi-Al Foundation for help. But how can they cure an infection of the mind?
    • 7. The Invisible Enemy, Part Three

      15 Oct '77
      Miniaturized 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.
    • 8. The Invisible Enemy, Part Four

      22 Oct '77
      The Nucleus, now grown to human size, is determined to spawn and take over the Galaxy. Only the Doctor and Leela can stop it.
    • 9. Image of the Fendahl, Part One

      29 Oct '77
      England, the late 1970s. At Fetch Priory, Dr Fendelman's experiments with the new Time Scanner are disrupted by the mysterious death nearby of a hiker. 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?
    • 10. Image of the Fendahl, Part Two

      05 Nov '77
      The mystery surrounding the strange skull deepens. Thea is slowly succumbing to its influence while the Doctor prepares to battle a creature from mythology.
    • 11. Image of the Fendahl, Part Three

      12 Nov '77
      While Max prepares to tap supernatural forces beyond imagining, the Doctor and Leela investigate the legend of the Fendahl.
    • 12. Image of the Fendahl, Part Four

      19 Nov '77
      The Fendahl is returning to life, ready to consume everything in its path. Can the Doctor find a way to kill death itself?
    • 13. The Sun Makers, Part One

      26 Nov '77
      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...
    • 14. The Sun Makers, Part Two

      03 Dec '77
      The Doctor has been captured by the Gatherer. Leela works to free him but the Gatherer is already laying his own plans…
    • 15. The Sun Makers, Part Three

      10 Dec '77
      Now Leela is the prisoner of the Collector. He knows of the Doctor and is determined to rid himself of both of them.
    • 16. The Sun Makers, Part Four

      17 Dec '77
      The Doctor now moves to completely overthrow the Company. But the Collector has one last trump card to play.
    • 17. Underworld, Part One

      07 Jan '78
      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…
    • 18. Underworld, Part Two

      14 Jan '78
      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?
    • 19. Underworld, Part Three

      21 Jan '78
      The Minyans have, at long last, found the P7E. But a host of guards and robotic seers stand between them and the race banks.
    • 20. Underworld, Part Four

      28 Jan '78
      The Minyons struggle to gain the precious race banks from the Oracle. But perhaps it is giving in a little too easily ...
    • 21. The Invasion of Time, Part One

      04 Feb '78
      Gallifrey, world of the Time Lords. The Doctor returns and claims the vacant presidency. But his behaviour is erratic and his motives mysterious.
    • 22. The Invasion of Time, Part Two

      11 Feb '78
      Now President of Gallifrey, the Doctor puts a plan motion to apparent betray his people to an alien menace.
    • 23. The Invasion of Time, Part Three

      18 Feb '78
      Gallifrey, world of the Time Lords. The Doctor has claimed the presidency of the planet (on a technicality, following events in the previous season's The Deadly Assassin) and his behaviour is even more eccentric than usual in other ways, too: he refuses to speak to Leela and seems only to trust K9. But has he really betrayed Gallifrey to a Vardan invasion force? And is there a further power behind the Vardans?
    • 24. The Invasion of Time, Part Four

      25 Feb '78
      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?
    • 25. The Invasion of Time, Part Five

      04 Mar '78
      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…