The Key to Time Plot

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.

Doctor Who The Key to Time aired on September 2nd, 1978.

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The Key to Time Episodes

60

1. The Ribos Operation (1)

September 2nd, 197825 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…

60

2. The Ribos Operation (2)

September 9th, 197825 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.

60

3. The Ribos Operation (3)

September 16th, 197825 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.

60

4. The Ribos Operation (4)

September 23rd, 197825 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.

70

5. The Pirate Planet (1)

September 30th, 197825 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.

70

6. The Pirate Planet (2)

October 7th, 197825 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?

70

7. The Pirate Planet (3)

October 14th, 197825 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.

70

8. The Pirate Planet (4)

October 21st, 197825 min

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

74

9. The Stones of Blood (1)

October 28th, 197825 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...

73

10. The Stones of Blood (2)

November 4th, 197825 min

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.

73

11. The Stones of Blood (3)

November 11th, 197825 min

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

73

12. The Stones of Blood (4)

November 18th, 197825 min

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.

65

13. The Androids of Tara (1)

November 25th, 197825 min

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.

60

14. The Androids of Tara (2)

December 2nd, 197825 min

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.

60

15. The Androids of Tara (3)

December 9th, 197825 min

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.

60

16. The Androids of Tara (4)

December 16th, 197825 min

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.

53

17. The Power of Kroll (1)

December 23rd, 197825 min

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…

53

18. The Power of Kroll (2)

December 30th, 197825 min

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

53

19. The Power of Kroll (3)

January 6th, 197925 min

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.

53

20. The Power of Kroll (4)

January 13th, 197925 min

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.

66

21. The Armageddon Factor (1)

January 20th, 197925 min

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

65

22. The Armageddon Factor (2)

January 27th, 197925 min

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

65

23. The Armageddon Factor (3)

February 3rd, 197925 min

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

58

24. The Armageddon Factor (4)

February 10th, 197925 min

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

58

25. The Armageddon Factor (5)

February 17th, 197925 min

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.

60

26. The Armageddon Factor (6)

February 24th, 197925 min

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.

All Seasons

Season 26

Season 26

Sep 6, 1989
Season 25

Season 25

Oct 5, 1988
Season 24

Season 24

Sep 7, 1987
Season 22

Season 22

Jan 5, 1985
Season 21

Season 21

Jan 5, 1984
Season 20

Season 20

Jan 3, 1983
Season 19

Season 19

Jan 4, 1982
Season 18

Season 18

Aug 30, 1980
Season 17

Season 17

Sep 1, 1979
The Key to Time

The Key to Time

Sep 2, 1978
Season 15

Season 15

Sep 3, 1977
Season 14

Season 14

Sep 4, 1976
Season 13

Season 13

Aug 30, 1975
Season 12

Season 12

Dec 28, 1974
Season 11

Season 11

Dec 15, 1973
Season 10

Season 10

Dec 30, 1972
Season 9

Season 9

Jan 1, 1972
Season 8

Season 8

Jan 2, 1971
Season 7

Season 7

Jan 3, 1970
Season 6

Season 6

Aug 10, 1968
Season 5

Season 5

Sep 2, 1967
Season 4

Season 4

Sep 10, 1966
Season 3

Season 3

Sep 11, 1965
Season 2

Season 2

Oct 31, 1964
Season 1

Season 1

Nov 23, 1963
Specials

Specials

Aug 26, 1991