I'm sure I'm not the only person who's been combing this week's Radio Times in search of clues (and muttering through clenched teeth, 'Enough with the monsters already.' ). No photographs of DT or any character other that the big enemy, but there are some remarks from Catherine Tate about the general tone of the piece.
The remarks below are principally meta on TSE. There aren't any actual spoilers, though I do talk about the tone of the finale and things certain people have said about it. No plot points are mentioned for JE, either known or speculative, that couldn't be inferred from what we've seen up to the end of E12.