I really liked last nights episode of The Nightmare in Silver. And I was really glad that Warwick Davis was in it! His performance was really good, as usual.
Trenzalore was a place that, according to Dorium Maldovar, the Doctor would visit at some point in his travels, which would coincide with 'the Fall of the Eleventh'. Maldovar also told the Doctor that at this time and place 'no living creature can speak falsely or fail to answer.' Here, the First Question in the universe would be asked.
The Silence were determined that the Doctor never reach Trenzalore, so that the question would never be answered. It was a creed of the Silence that 'Silence will fall when the Question is asked', or as Maldovar translated it, 'Silence must fall'. (TV: The Wedding of River Song)
Ah! so that`s it. Clara is the one who asks the first question?
Could it be that another regeneration is about to happen?
I`m also wondering if, since were now at the series 50`th aniversary we might get a Doctor meeting himself story with a guest appearance of David Tennant and Billy Piper.
They did this after all during previous aniversaries, most notably with the `Five Doctors` episodes.
It's too early to speculate on what's going to happen when the show resumes. There are at least two theories floating around in the web and both are very plausible. I won't say much more until later when I'm sure everyone has had time to catch up.
Spoilers*
I really thought I was done with all that River nonsense but nooooooo