Prologue (webcast)

The Series 9  was a prequel to the ninth season of Doctor Who, which was released 11 September 2015 on the Doctor Who website and BBC iPlayer.

Plot
The Twelfth Doctor has returned to Karn and discusses the nature of friends and enemies with Ohila of the Sisterhood of Karn. The two discuss an invitation given to the Doctor by an unnamed individual, someone who the Doctor has known for a long time, but has been enemies with for almost all that time.

Ohila doesn't believe the Doctor when he says he will not visit him, and continues to question his reasons. Eventually the Doctor says he will go "soon", and gives Ohila an object that he says she knows who to give it to.

Cast

 * The Doctor - Peter Capaldi
 * Ohila - Clare Higgins

Story notes
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Ratings
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Filming locations
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Production errors
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Continuity

 * The Doctor previously met Ohila in his eighth incarnation, who gave him the means to regenerate into his war incarnation. (TV: The Night of the Doctor)
 * The Doctor tells Ohila, "Look after the universe. I've put a lot of work into it." When he had just regenerated, the Eleventh Doctor made a similar statement to the Atraxi; while he was speaking on the Earth's behalf and the Atraxi noted he was not native to that world, the Doctor replied, "No, but I've put a lot of work into it."

DVD releases
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Blu-ray releases
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