After a few little teasers, the BBC have now released a longer trailer which gives more hints about what’s going on. Daleks!!! A dinosaur!!! And the Doctor talking about going into darkness! Sounds like fun, and it begins on August 23
 Or thirty-something. Ot fnargle. Or something
 And yes, I know scripts and a rough edit have leaked, and I don’t want to know what’s in them, OK? No spoilers here, thankyouverymuch.
 A playmate for Vastra, maybe?