The episode will be screened at the annual gathering of senior figures from within the Television industry on Friday 26th August.
Story synopsis follow - can be considered spoilers
In the desperate search for Melody Pond, the TARDIS crash lands in 1930s Berlin, bringing the Doctor face to face with the greatest war criminal in the Universe. And Hitler. The Doctor must teach his adversaries that time travel has responsibilities - and in so doing, learns a harsh lesson in the cruellest warfare of all.