Seasons & episodes
S15 · E12Image of the Fendahl (4) 1977-11-19 · 25 min
The Fendahl is returning to life, ready to consume everything in its path. Can the Doctor find a way to kill death itself?
S15 · E13The Sun Makers (1) 1977-11-26 · 25 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...
S15 · E14The Sun Makers (2) 1977-12-03 · 25 min
The Doctor has been captured by the Gatherer. Leela works to free him but the Gatherer is already laying his own plans…
S15 · E15The Sun Makers (3) 1977-12-10 · 25 min
Now Leela is the prisoner of the Collector. He knows of the Doctor and is determined to rid himself of both of them.
S15 · E16The Sun Makers (4) 1977-12-17 · 25 min
The Doctor now moves to completely overthrow the Company. But the Collector has one last trump card to play.
S15 · E17Underworld (1) 1978-01-07 · 25 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…
S15 · E18Underworld (2) 1978-01-14 · 25 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?
S15 · E19Underworld (3) 1978-01-21 · 25 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.
S15 · E20Underworld (4) 1978-01-28 · 25 min
The Minyons struggle to gain the precious race banks from the Oracle. But perhaps it is giving in a little too easily ...
S15 · E21The Invasion of Time (1) 1978-02-04 · 25 min
Gallifrey, world of the Time Lords. The Doctor returns and claims the vacant presidency. But his behaviour is erratic and his motives mysterious.
S15 · E22The Invasion of Time (2) 1978-02-11 · 25 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.
S15 · E23The Invasion of Time (3) 1978-02-18 · 25 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.
S15 · E24The Invasion of Time (4) 1978-02-25 · 25 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?
S15 · E25The Invasion of Time (5) 1978-03-04 · 25 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…
S15 · E26The Invasion of Time (6) 1978-03-11 · 25 min
The Sontarans finally invade the TARDIS itself, seeking the Great Key. The Doctor, however, has other uses for this powerful object…
S16 · E1The Ribos Operation (1) 1978-09-02 · 25 min
The Magellanic Clouds, the planet Ribos, an unknown time. Ordered by the White Guardian to collect the pieces of the omnipotent Key to Time, The Doctor, K-9 and his new assistant Romana arrive. Collecting the first segment is not going to be easy…
S16 · E2The Ribos Operation (2) 1978-09-09 · 25 min
Trying to obtain the first segment of the Key to Time, the Doctor and Romana are swept up in an elaborate con. The target – the homicidal Graff Vynda K.
S16 · E3The Ribos Operation (3) 1978-09-16 · 25 min
Prisoners of the maniacal Graff Vynda K, the Doctor and Romana must break out and pursue the first segment – even as Unstoff takes it into the most dangerous place on Ribos.
S16 · E4The Ribos Operation (4) 1978-09-23 · 25 min
Trapped in the catacombs between a mad warlord and ravenous monsters, the Doctor and Romana work desperately to obtain the segment of the Key to Time - and escape alive.
S16 · E5The Pirate Planet (1) 1978-09-30 · 25 min
Planet Zanak, unknown time. The Doctor and Romana are seeking the planet Calufrax where the second segment waits. They are in the right place and the right time… but on the wrong planet.
S16 · E6The Pirate Planet (2) 1978-10-07 · 25 min
The Doctor begins to investigate the mysteriously wealthy planet Zanak. Mentiads, a deranged Captain, strange omens, miraculous mines – what does it all mean? And what does it have to do with the Key to Time?
S16 · E7The Pirate Planet (3) 1978-10-14 · 25 min
The Mentiads take the Doctor, Romana and Kimus to a reunion with K9 and Mula, where they set about trying to defeat the Captain.
S16 · E8The Pirate Planet (4) 1978-10-21 · 25 min
The Captain and Xanxia work toward their secret goals. Both depends on the pirate planet consuming one more victim - Earth.
S16 · E9The Stones of Blood (1) 1978-10-28 · 25 min
England, the late 1970s. The Doctor and Romana arrive in search of the third segment. But the Tracer readings are erratic and something ominous is happening with an ancient stone circle...