Doctor Who - The Key to Time

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.

• S16 E1 - The Ribos Operation (1)

• S16 E2 - The Ribos Operation (2)

• S16 E3 - The Ribos Operation (3)

• S16 E4 - The Ribos Operation (4)

• S16 E5 - The Pirate Planet (1)

• S16 E6 - The Pirate Planet (2)

• S16 E7 - The Pirate Planet (3)

• S16 E8 - The Pirate Planet (4)

• S16 E9 - The Stones of Blood (1)

• S16 E10 - The Stones of Blood (2)

• S16 E11 - The Stones of Blood (3)

• S16 E12 - The Stones of Blood (4)

• S16 E13 - The Androids of Tara (1)

• S16 E14 - The Androids of Tara (2)

• S16 E15 - The Androids of Tara (3)

• S16 E16 - The Androids of Tara (4)

• S16 E17 - The Power of Kroll (1)

• S16 E18 - The Power of Kroll (2)

• S16 E19 - The Power of Kroll (3)

• S16 E20 - The Power of Kroll (4)

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