"That's impossible," Simon said quickly. It was impossible. There was no conceivable way he could have gone back to ... to Earth-that-Was. "I ... River," he said quietly, his stomach twisting suddenly. Oh, god. River. "No, she ... I can't ... be here. She needs me to be there. If I'm not there, she ..."
Of course, River shouldn't be his primary concern right now, but for the past several years, she had been his only concern. So it was natural enough for his mind to leap first to her well-being before he considered his. He swallowed hard, and shook his head before he glanced up to Susan.
"Why ... why can't we leave?" He asked. They'd gotten here -- somehow -- so why couldn't they find their way back? Of course, he didn't know how he'd gotten here, so he had no idea how he could reverse it, but surely someone here must know.