Trailer for the Second Half of Series 6

The second 1/2 of the sixth series of Doctor Who is approaching soon bringing up the question what should we expect?

6 - 8 "Let's Kill Hitler"  27 August 2011 (US) 

Synopsis: 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 cruelest warfare of all.

I wonder if this will touch back on why the Doctor must have rules.

6 - 9 "Night Terrors"

it is set in the modern day and is called ‘Night Terrors’ and centres on a little boy who has a fear of something.

Could we see a return of the Dream Lord?

6 - 10 "The Girl Who Waited"

Some have suggested that this episode will go back to the events from Matt Smith's first adventure with Amy I don't agree.

This will have more to do with River Song as the girl who waited. 

6 - 11 "The God Complex"

Walliams is to play an alien called Gibbis, and the story is perhaps one of the creepiest looking of the series. It all takes place in a hotel

I love the look of the monsters from the trailer and can't wait to see them. 

6 - 12 "Untilted"

... sees the return of James Corden as Craig Owens, who shared a flat with the doctor in last years episode ‘The Lodger.’

I wonder if this will also bring the return of "The Silence".  I feel we have not seen the end of them and how the Doctor will avoid his death.

6 - 13 "Untilted"

Detailes have not been leaked for this episode yet but maybe this is where we find out that the Doctor is really in the space suit and who was shot was actually the Dream Lord aka The Valeyard.  I'm still waiting to see the return of The Valeyard who if they stay true to Doctor Lore we know happened during his 11th regeneration which is the Matt Smith Doctor.

(via SciFiPulse.Net » BBC Reveal Details Of New ‘Doctor Who’ Episodes)