SFX have released 20 non-spoilery teasers for A Good Man Goes to War!

1 It is amazing – a true five-star episode

2 There are lots of spaceships – and that’s just in the teaser

3 There is a very Star Wars feel (The Empire Strikes Back especially) even down to the shape of the windows and the music

4 It’s action-packed and feels so much more epic than a usual single parter

5 There are lots of suprise guests stars (and some will be a surprise) but unlike in “The Pandorica Opens” none of them feels wasted – they all have a chance to shine…

6 …Apart from one maybe

7 It cracks along at a hell of a pace

8 There are some revelations that really will make your jaw drop

9 There is a terrific battle scene at the end (which more than makes up for a slightly underwhelming and confusingly directed one in the first half)

10 Although there’s lots of time travelling, it’s not a timey-whimey-reliant plot.

11 The Doctor produces something very revealing from the TARDIS

12 Rory says something very funny to an old enemy that you can’t believe has never been said before

13 It’s a great episode for both Rory and Amy (and Matt Smith is as brilliant as ever, especially in a sudden, unexpected emotional moment)

14 A throwaway line from last season becomes a major plot device

15 Somebody is asked to make a donation

16 Somebody very unexpected is playing doctors and nurses

17 We get to see somebody’s muff

18 Rory is definitely cool

19 Look carefully at the monitor screens…

20 …And the corridors

21 And please, please, please, if anyone has leaked the title for the next episode onto the internet, avoid the temptation to check it out. When the caption comes up at the end, “The Doctor Will Be Back In…” it was so unexpected and made us grin so much, we’d hate you to miss having the same experience…