The Key to Time poster
26 episodes

Doctor Who - The Key to Time

First aired Sep 2, 1978Season 16

This season saw the introduction of the Black and White Guardians as well as the companion Romana, who became only the second female Time Lord companion since Susan. This season is sometimes colloquially known as The Key to Time season after the story arc involving the Key to Time. Although not the first season to consist of linked stories (Season 8 in 1971 was the first, as all the stories that year featured the Master), it was the first to be recognised as having a series long arc. Although multi serial arcs would occur again, such a full- season experiment wouldn't be attempted again until Season 23. The arc has a number of similarities to the Season 1 story The Keys of Marinus. The storyline was originally proposed for Season 15, but it required more planning.

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Reviews

Community reviews for Doctor Who, shown here with its season details.

c

cloister56

10.0

How do you review a show like Doctor Who that has been running for so long, enjoying dizzying highs and terrible lows (I'm looking at you The Twin Dilemma). The concept is the most open there can be. With the TARDIS the show can go anywhere and any when. This lead to a huge range in the stories, from historical with no alien involvement like The Aztecs (1964), to full on sci-fi like The Daleks (1963) and that was just the first series. The show created some of the most memorable monsters with the Daleks and Cybermen being the most famous. Even outside the recurring creatures there were fantastic adversaries like an Egyptian god bent on destruction to an alien splintered through time. Doctor Who also embraced change in the form of the regeneration. The actor playing the Doctor could change and play the part differently but it still was the Doctor. This led to changes in approach to problems and in the attitude of the central character while keeping core values the same. The Doctor is one of the few heroes who rarely resorts to violence to solve problems, usually relying on his intelligence and wits. The show also truly innovated. Many special effects were tried out for the first time on screen. It didn't always work but working with what they had they created some truly memorable television like creating a convincing lunar surface 2 years before the moon landings (The Moonbase 1967). This is my favourite of all television shows, it wasn't always perfect but I love it all the same.

Episodes

The Ribos Operation (1) still

Episode 1

The Ribos Operation (1)

6.7
Sep 2, 197825 min9 votes

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…

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Episode 2

The Ribos Operation (2)

6.6
Sep 9, 197825 min8 votes

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.

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Episode 3

The Ribos Operation (3)

6.6
Sep 16, 197825 min8 votes

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.

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Episode 4

The Ribos Operation (4)

6.6
Sep 23, 197825 min8 votes

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.

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Episode 5

The Pirate Planet (1)

7.4
Sep 30, 197825 min10 votes

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.

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Episode 6

The Pirate Planet (2)

7.7
Oct 7, 197825 min9 votes

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?

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Episode 7

The Pirate Planet (3)

7.6
Oct 14, 197825 min9 votes

The Mentiads take the Doctor, Romana and Kimus to a reunion with K9 and Mula, where they set about trying to defeat the Captain.

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Episode 8

The Pirate Planet (4)

7.4
Oct 21, 197825 min9 votes

The Captain and Xanxia work toward their secret goals. Both depends on the pirate planet consuming one more victim - Earth.

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Episode 9

The Stones of Blood (1)

7.8
Oct 28, 197825 min10 votes

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...

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Episode 10

The Stones of Blood (2)

7.7
Nov 4, 197825 min9 votes

The quest for the Third Segment has landed the Doctor and Romana in the midst of a druidic cult centred on a stone circle. But the stones are not what they seem, and somewhere out there is a blood-thirsty Celtic goddess.

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Episode 11

The Stones of Blood (3)

7.4
Nov 11, 197825 min9 votes

Chased by blood-thirsty stones, the Doctor must find a way to rescue Romana. What awaits him in the theoretical absurdity of hyperspace?

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Episode 12

The Stones of Blood (4)

7.4
Nov 18, 197825 min9 votes

Facing a sentence of death from merciless justice machines, the Doctor must play for time while Romana tries to discover just who Vivian Fey really is.

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Episode 13

The Androids of Tara (1)

6.9
Nov 25, 197825 min9 votes

Arriving on Tara, Romana locates the fourth segment of the Key to Time with ease. But getting it away proves more difficult, as she is captured by the scheming Count Grendel who wants the throne of Tara for himself.

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Episode 14

The Androids of Tara (2)

6.6
Dec 2, 197825 min8 votes

The Doctor must employ a desperate gambit to keep the evil Grendel off the throne. And the Count has a new pawn to play - Romana.

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Episode 15

The Androids of Tara (3)

6.8
Dec 9, 197825 min8 votes

The battle for control of Tara turns into a duel of wits between the Doctor and Grendel. But the Count shows he has more treacherous tricks up his sleeve.

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Episode 16

The Androids of Tara (4)

6.8
Dec 16, 197825 min8 votes

Grendel plans two weddings and a funeral to cement his hold over Tara. The Doctor and K-9 race to foil him and save the Time Lady's life.

The Power of Kroll (1) still

Episode 17

The Power of Kroll (1)

6.1
Dec 23, 197825 min9 votes

The Third Moon of Delta Magna, The Future. The Doctor and Romana arrive in search of the fifth segment and are immediately swept up in a conflict between the crew of a new refinery and the embittered natives…

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Episode 18

The Power of Kroll (2)

5.9
Dec 30, 197825 min7 votes

The Doctor and Romana try to avoid being sacrificed to Kroll – just in time for the real monster to appear.

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Episode 19

The Power of Kroll (3)

5.7
Jan 6, 197925 min7 votes

The massive Kroll is awake and killing anyone in its path. And the swampies are determined to appease it – by sacrificing the Doctor and Romana.

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Episode 20

The Power of Kroll (4)

5.7
Jan 13, 197925 min7 votes

The Doctor and Romana are trapped between the monstrous Kroll and the insane refinery commander. And there is no sign of the fifth segment of the Key to Time.

The Armageddon Factor (1) still

Episode 21

The Armageddon Factor (1)

6.7
Jan 20, 197925 min10 votes

Searching for the sixth segment, the Doctor and Romana land in the midst of a brutal nuclear war between the planets Atrios and Zeos.

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Episode 22

The Armageddon Factor (2)

6.7
Jan 27, 197925 min9 votes

Swept up in an apocalyptic war, the Doctor must help the Marshal defend his planet. But who or what controls the Marshal?

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Episode 23

The Armageddon Factor (3)

6.8
Feb 3, 197925 min9 votes

The Doctor meets a new enemy – the Shadow – who wants the Key to Time. And the Atrian-Zeon war is approaching an awful climax.

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Episode 24

The Armageddon Factor (4)

6.6
Feb 10, 197925 min9 votes

The Doctor is forced into a desperate gambit to prevent a massacre. But it is getting harder to tell friend from foe.

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Episode 25

The Armageddon Factor (5)

6.4
Feb 17, 197925 min9 votes

The Doctor and Romana finally venture into the Shadow's lair. The Shadow appears to hold all the cards but the Doctor has found an old friend.

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Episode 26

The Armageddon Factor (6)

6.7
Feb 24, 197925 min9 votes

The Doctor and the Shadow have their final confrontation to take control of the Key to Time. Completing it may entail an awful sacrifice. And the Black Guardian will do anything to obtain it and plunge the Universe into chaos.