Woop! Woop!Its really getting exciting now :)
This scene kinda feels like the end of the episode to me. It has the Doctor, his new companion (Lindsay Duncan) and two other people emerging from the TARDIS in the middle of a snowy street.
Outer-two awesome pictures are courtesy of Alun.Vega
The robot seen in earlier filming is also there (it has the word "GADGET" written on its front) and it seems friendly as it trundels forward to talk to the Doctor.
The two unknown companions run off together halfway through the scene. I don't know the relation these people have to each other but the younger woman certainly seems wary of the other two.
Ahremsee managed to beautifully capture the scene in this video.
Although you can't really hear whats being said, we know that halfway through (when the Doctor looks up) he says 'its snowing! I love snow.'
And according to Victoria Feller, the line immediately after this (said by the male companion) is something along the lines of 'its not snow...' as he holds out his hand. So more ash from some destroyed ship/planet/thing?
She also noticed that, despite the snow, there were no Christmas decorations about, and Lindsay Duncan's belt holds a small holster and handgun - which matches the guerilla/army type clothes she's wearing.
Scooty also managed to get photos of nearby street signs claiming:
Congestion charging Central Zone
Fine of 3000 yen per day
So maybe a parallel/future Earth? Or just another planet... Or just Earth...
Anywho, after that we're left with the Doctor and Lindsay together. I don't know what goes on between them but at some point the Doctor points the sonic at a house that Lyndsay then goes over to.
And then it gets REALLY interesting.
As the Doctor heads back to the TARDIS, it seems like he hears something. He looks to his left, shocked and aghast, slumping against the TARDIS and then falls to his knees. After this it seems he then gets up, rushes into the TARDIS and slams the door.
A horrified Doctor
Picture courtesy of The Gather
And now we have a video of the Doctor falling to his knees!
According to Lucky Lady, they apparently filmed two versions of this scene. One where the above events happened, and the other where the Doctor simply enters the TARDIS.
The reason he gets so freaked out? Oh, let the speculation commence... the robot? A returning villian? Or... and I'm not positive of it, but this could very well be the reason the Doctor looks to freaked out:
Oh yes, Ood Sigma is back!
So goodness knows what cliffhanger this is leading off to! According to Scooty, he doesn't interact wit the characters, but just seems to appear at the end of the scene...
Cue endless speculation about Donna, DoctorDonna, 'your song will end soon' etc etc!