Howling:Metal Plate

You forgot an important element in the story Kill the Moon It's a metal plate that prevents the three to be sucked.

This plate is important because it is found on the ship in episode 2 of season 7: Dinosaurs were Spaceship in the 27th minute, as we have seen. As episode 7 of season 7: The Rings of Akhaten when clara lies with merry in the 12th minute and in episode 10 of season 7, Journey to the Centre of the TARDIS, the metal plate on clara in the 7th minute. There may be others but I do not have to find.

Sorry for my English.