This frame is from episode 7, The Rings of Akhaten, In this The Doctor comments how he's "seen bigger", but later after prompting says he was "joking it's massive!". Behind him is Clara and actress Emilia Jones.
Rumor is this huge Sun is alive, because it has something that resembles a face, do you think it's a coincidence?
Never swing at a Cyberman Clara! Even is you do have a huge mallet....Behind her, a male solider with a gun - perhaps that will work against them?
The Cyberman reacts to this and pulls the mallet off Clara - but will she fight back? Tune into episode 12, The Last Cyberman to see.
The Doctor here, hanging onto some sort of rope, that will go down some portal/whirlpool. Rumored to be from Journey to the Center of the TARDIS.
The TARDIS is blowing apart, and if you look carefully also happens to be on fire, presumably from Journey to the Center of the TARDIS, but could be episode 13.