The BBC have released a prologue to Series 9 of Doctor Who, which was revealed exclusively on the BBC Doctor Who website.

The prologue, which is not to be confused with 'The Doctor's Meditation' (another prologue, exclusively for US cinema goers), shows The Doctor on the planet Karn, speaking with Sisterhood Of Karn leader, Ohila. The pair discuss the return of an old enemy who has summoned The Doctor.

The prologue can be viewed in the player, below:
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+  Series 9 of Doctor Who will air on 19th September at 7:40pm.

[Source: BBC Worldwide]