Season 15
26 episodes · 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.
Season Videos
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S15E1Horror of Fang Rock (1)
Sep 3, 197725mThe 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?
S15E2Horror of Fang Rock (2)
Sep 10, 197725mThe 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?
S15E3Horror of Fang Rock (3)
Sep 17, 197725mThe 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…
S15E4Horror of Fang Rock (4)
Sep 24, 197725mThe 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.
S15E5The Invisible Enemy (1)
Oct 1, 197725mDeep 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?
S15E6The Invisible Enemy (2)
Oct 8, 197725mLeela and Lowe take the Doctor to the Bi-Al Foundation for help. But how can they cure an infection of the mind?
S15E7The Invisible Enemy (3)
Oct 15, 197725mMiniaturised 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.
S15E8The Invisible Enemy (4)
Oct 22, 197725mThe Nucleus, now grown to human size, is determined to spawn and take over the Galaxy. Only the Doctor and Leela can stop it.
S15E9Image of the Fendahl (1)
Oct 29, 197725mEngland, 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?
S15E10Image of the Fendahl (2)
Nov 5, 197725mThe mystery surrounding the strange skull deepens. Thea is slowly succumbing to its influence while the Doctor prepares to battle a creature from mythology.
S15E11Image of the Fendahl (3)
Nov 12, 197725mWhile Max prepares to tap supernatural forces beyond imagining, the Doctor and Leela investigate the legend of the Fendahl.
S15E12Image of the Fendahl (4)
Nov 19, 197725mThe Fendahl is returning to life, ready to consume everything in its path. Can the Doctor find a way to kill death itself?
S15E13The Sun Makers (1)
Nov 26, 197725mPluto, 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...
S15E14The Sun Makers (2)
Dec 3, 197725mThe Doctor has been captured by the Gatherer. Leela works to free him but the Gatherer is already laying his own plans…
S15E15The Sun Makers (3)
Dec 10, 197725mNow Leela is the prisoner of the Collector. He knows of the Doctor and is determined to rid himself of both of them.
S15E16The Sun Makers (4)
Dec 17, 197725mThe Doctor now moves to completely overthrow the Company. But the Collector has one last trump card to play.
S15E17Underworld (1)
Jan 7, 197825mDeep 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…
S15E18Underworld (2)
Jan 14, 197825mAfter 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?
S15E19Underworld (3)
Jan 21, 197825mThe Minyans have, at long last, found the P7E. But a host of guards and robotic seers stand between them and the race banks.
S15E20Underworld (4)
Jan 28, 197825mThe Minyons struggle to gain the precious race banks from the Oracle. But perhaps it is giving in a little too easily ...
S15E21The Invasion of Time (1)
Feb 4, 197825mGallifrey, world of the Time Lords. The Doctor returns and claims the vacant presidency. But his behaviour is erratic and his motives mysterious.
S15E22The Invasion of Time (2)
Feb 11, 197825mThe 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.
S15E23The Invasion of Time (3)
Feb 18, 197825mThe 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.
S15E24The Invasion of Time (4)
Feb 25, 197825mThe 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?
S15E25The Invasion of Time (5)
Mar 4, 197825mThe 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…
S15E26The Invasion of Time (6)
Mar 11, 197825mThe Sontarans finally invade the TARDIS itself, seeking the Great Key. The Doctor, however, has other uses for this powerful object…