The Doctor had started to pace as he listened to the dialogue going on around him. None of the information was particularly useful. But he was trying his best to file it all away. Then Cosima's voice broke through as she called his name. Not as effective as Jamie's voice, but well, he wasn't here, but was that for the best?

He heard The Outsider's reply before he could get a word in. So he first spoke to the man. "Why do people always do that? Are you all simple? Mucking about time when you don't know the first thing about what you're doing."

He huffed and answered tried to answer properly. "Cosima, the future is no more malleable than the past."

He paused a small moment, and adjusted his tone. He spoke to everyone in the block.

"Now that we're here, we're a part of events. If we go back, and that's a pretty big if given the technology here, and we try to change things to prevent this future from happening, we might end up preventing the events that caused us to come here in the first place. That creates a paradox loop. Time, will try to heal the tear that paradox creates, which means all of our timelines will disintegrate."

He considered things for a moment. He had to squash this idea of changing time as quickly as possible.

"But if you all want to end up very dead very quickly, by all means, go ahead and try to change things."