28 episodes were originally broadcast in 1978
The TARDIS lands on a spaceship which is crewed by the survivors of the planet Minyos.
Tthe Minyan survivors discover what they have been searching for. But their arrival is not welcomed.
The Doctor and Leela attempt to penetrate the Citadel of the Seers to rescue Idas's father.
The Minyans are eager to recover the race banks that they have waited so long to find.
The Doctor returns to Gallifrey and abruptly stakes his claim on the Time Lord presidency.
The Doctor is made president of the Time Lords and immediately orders K9 to lower the planet's defences.
The Doctor has betrayed his own people and enabled a Vardan invasion of Gallifrey.
As the Vardans finally fully materialise on Gallifrey, the Doctor prepares to spring his trap.
The Sontarans have taken control of the Capital on Gallifrey and intend to use the power of the Time Lords.
Stor, the Sontaran leader, finally gains access to the TARDIS in search of the Great Key of Rassilon.
The Doctor is given the task of reassembling the six parts of the Key to Time by the the White Guardian.
Trying to obtain the first segment of the Key to Time, the Doctor and Romana are swept up in an elaborate con.
Prisoners of the maniacal Graff Vynda K, the Doctor and Romana must break out and pursue the first segment.
The Doctor and Romana work desperately to obtain the segment of the Key to Time - and escape alive.
Instead of landing on Calufrax, they arrive on a different planet and encounter the Mentiads.
The Doctor and Romana encounter the telepathic Mentiads and Zanak's ruler, the half man, half robot Captain.
The Doctor has discovered the sinister truth about Zanak and solved the mystery of the missing planet.
Time is running out for the Doctor and Romana in their struggle to defeat the Captain.
The Doctor and Romana arrive at a circle of standing stones in the English countryside.
The quest for the Third Segment has landed the Doctor in the midst of a druidic cult centered on a stone circle.
Chased by blood-thirsty stones, the Doctor must find a way to rescue Romana.
The Doctor must play for time while Romana tries to discover just who Vivian Fey really is.
Arriving on the techno-Ruritanian world of Tara, Romana easily obtains the Fourth Segment...
The Doctor must employ a desperate gambit to keep the evil Grendel off the throne.
The Doctor must keep the android "king" running while Grendel plots to use Romana to destroy him.
Grendel plans two weddings and a funeral to cement his hold over Tara.
Searching for the Key to Time lands the Doctor and Romana in trouble on the third moon of Delta Magna.
Things look bleak for the Doctor and Romana, particularly when Kroll awakes.
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