• The episode is called The Wedding of River Song.
• It stars Mark Gatiss (possibly as a space~viking, see THIS post), Simon Callow (Charles Dickens in The Unquiet Dead), Simon Fisher-Becker (Dorium Maldovar in The Pandorica Opens and A Good Man Goes To War) and Ian McNeice (Winston Churchill in Victory of the Daleks).
• Includes the lines, “I don’t want to marry you,” and “I don’t want to murder you.”
• The Doctor goes to his certain death – and it doesn’t work out as well as he expected.
• The Pterodactyls featured in the trailer are from this story (this is from TV & Satellite Week).
• According to What’s On TV, the episode will feature “a bizarre world full of children” and a “thrilling climax among strange pyramids”.
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Mark Gatiss in the Series 6, Part 2 trailer?
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Guide to Series 6, Part 2
Series 6, Part 2 – BBC America preview
Let’s Kill Hitler – 12 Quotes