SFX has a pretty good alledgedly spoiler free preview. Among their teasers are:
4 The teaser looks like it was more expensive than the rest of the “back six” put together. It’s a visual and conceptual delight
5 It does answer a lot of questions, but some old ones (from Matt Smith’s first series) are still left open, and some new ones are posed
8 You’ll discover a whole new meaning to the phrase “Live Chess” that has nothing to do with Harry Potter
9 The Doctor wonders if he could be the fifth member of something
10 Wi-fi comes in handy
12 There are some unexpected (truly unexpected) returning characters
13 There’s a moving tribute to an old friend
14 The Doctor offers and eye for an eye patch
15 A big revelation may remind you of Little Britain
18 The episode title may not be as much of a red herring as you might think. But then again…
19 Bow ties are not just cool, they’re useful on occasion
20 It’s a bit of a gamechanger
21 The eye patch is explained
Check more here.
Streaming Options