Next Time: The Wedding of River Song

Next Saturday sees the premiere of The Wedding of River Song - the final episode in the current series of Doctor Who - broadcast on BBC1/BBC1HD at 7:05pm, 1st October in the United Kingdom; it then follows on SPACE in Canada at 8:00pm ET, on BBC America in the United States at 9:00pm ET, and on ABC1 in Australia at 7:30pm on the 8th October.

The BBC synopsis for the episode follows, which might be considered a spoiler:

As the Doctor makes his final journey to the shores of Lake Silencio in Utah, he knows only one thing can keep the universe safe – his own death – in the concluding episode of this series of the time-travelling drama. But has he reckoned without the love of a good woman?

The Wedding of River Song: Trailer, BBC, via YouTube - may not play outside of the United Kingdom

The Wedding of River Song: Next Time Trailer, BBC, via the BBC Doctor Who site - may not play outside of the United Kingdom

The BBC have also released an introduction to the episode in the form of a special scene taking place before the story begins:

The Wedding of River Song: Prequel, BBC, via the BBC Doctor Who site - may not play outside of the United Kingdom
Alternatively there is a YouTube version.