This episode was great - loved the spookiness, loved the monster, loved the dilemma, everything - except for ONE major problem. There was no reason for Midnight to be a part of it at all. It didn't add anything, it didn't explain anything about how the monster worked, there was no major reason for the setting to have to be the same, and quite frankly, it wasn't even clear at all that it WAS the same monster since in Midnight the way the monster worked was very different. Russell T Davies seems unable to stop referencing/reusing his older work to the detriment of his stories this era and it's getting tiring. Like come on, the Doctor can go anywhere in the whole universe, there have to be tons of planets and aliens that we haven't seen yet! It's just so frustrating to have an episode that would be perfect except for this one thing. All that said, I LOVE suicide in Doctor Who — excellent to see a story where they use it to solve the problem and it doesn't even work!