Episode guide
Doctor Who: Season 15
26 episodes · premiered Sep 3, 1977
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.
- Episode 1: Horror of Fang Rock (1) Sep 3, 1977 · 25m 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…
- Episode 2: Horror of Fang Rock (2) Sep 10, 1977 · 25m 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?
- Episode 3: Horror of Fang Rock (3) Sep 17, 1977 · 25m 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…
- Episode 4: Horror of Fang Rock (4) Sep 24, 1977 · 25m 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.
- Episode 5: The Invisible Enemy (1) Oct 1, 1977 · 25m 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…
- Episode 6: The Invisible Enemy (2) Oct 8, 1977 · 25m Leela and Lowe take the Doctor to the Bi-Al Foundation for help. But how can they cure an infection of the mind?
- Episode 7: The Invisible Enemy (3) Oct 15, 1977 · 25m 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.
- Episode 8: The Invisible Enemy (4) Oct 22, 1977 · 25m The Nucleus, now grown to human size, is determined to spawn and take over the Galaxy. Only the Doctor and Leela can stop it.
- Episode 9: Image of the Fendahl (1) Oct 29, 1977 · 25m 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…
- Episode 10: Image of the Fendahl (2) Nov 5, 1977 · 25m The mystery surrounding the strange skull deepens. Thea is slowly succumbing to its influence while the Doctor prepares to battle a creature from mythology.
- Episode 11: Image of the Fendahl (3) Nov 12, 1977 · 25m While Max prepares to tap supernatural forces beyond imagining, the Doctor and Leela investigate the legend of the Fendahl.
- Episode 12: Image of the Fendahl (4) Nov 19, 1977 · 25m The Fendahl is returning to life, ready to consume everything in its path. Can the Doctor find a way to kill death itself?
- Episode 13: The Sun Makers (1) Nov 26, 1977 · 25m 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…
- Episode 14: The Sun Makers (2) Dec 3, 1977 · 25m The Doctor has been captured by the Gatherer. Leela works to free him but the Gatherer is already laying his own plans…
- Episode 15: The Sun Makers (3) Dec 10, 1977 · 25m Now Leela is the prisoner of the Collector. He knows of the Doctor and is determined to rid himself of both of them.
- Episode 16: The Sun Makers (4) Dec 17, 1977 · 25m The Doctor now moves to completely overthrow the Company. But the Collector has one last trump card to play.
- Episode 17: Underworld (1) Jan 7, 1978 · 25m 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…
- Episode 18: Underworld (2) Jan 14, 1978 · 25m 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?
- Episode 19: Underworld (3) Jan 21, 1978 · 25m The Minyans have, at long last, found the P7E. But a host of guards and robotic seers stand between them and the race banks.
- Episode 20: Underworld (4) Jan 28, 1978 · 25m The Minyons struggle to gain the precious race banks from the Oracle. But perhaps it is giving in a little too easily ...
- Episode 21: The Invasion of Time (1) Feb 4, 1978 · 25m Gallifrey, world of the Time Lords. The Doctor returns and claims the vacant presidency. But his behaviour is erratic and his motives mysterious.
- Episode 22: The Invasion of Time (2) Feb 11, 1978 · 25m 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.
- Episode 23: The Invasion of Time (3) Feb 18, 1978 · 25m 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.
- Episode 24: The Invasion of Time (4) Feb 25, 1978 · 25m 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?
- Episode 25: The Invasion of Time (5) Mar 4, 1978 · 25m 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…
- Episode 26: The Invasion of Time (6) Mar 11, 1978 · 25m The Sontarans finally invade the TARDIS itself, seeking the Great Key. The Doctor, however, has other uses for this powerful object…