The Doctor stood there silent, gobsmacked. He paced round the room looking worried, and finally, he remembered the crack. He whipped out his Sonic Screwdriver placed it onto setting 7653 and temporarily closed the crack.
"What are you doing here? It's impossible. It's you, it's actually you. I've just come back from New York. And the Weeping Angel, it displaced you in time. It's impossible for you to be here! Do you know what you've done!" said the Doctor doing a little dance whilst walking. You could cut the tension in the room with a knife until finally he said, "Hello Ponds!" and gave them a hug.
"Doctor, Where's my Dad?" replied Rory sounding very concerned.
The Doctor had totally forgotten about Brian; he was too busy worrying about how Rory and Amy could reappear at this point in time.
"Yeah Doctor, where is Brian?" repeated Amy.
"You guys, Brian fell into the crack when you wandered in here as if nothing ever happened! How do you remember him anyway? He fell through the crack. He was erased from time and space and you shouldn't be able to remember him at all," replied the Doctor sounding a little more worried with every word he said. "We will get to that later though because first we need to work out how to get you home."
"We're here though, Doctor. Why not let us stay here. We can continue to travel with you."
Together." Rory then gave Amy a cheesy look, which made The Doctor look away.
"NO! You aren't meant to be here, neither of you. We saw it. We read it! You will die in New York, in that room, in that bed! I'm sorry but no matter what we do that will always have to happen," he said giving Rory a stern look.
They walked outside after hearing a massive crash and saw a middle-aged man walking. Nobody on the street seemed to know who he was as everyone kept asking, "Who are You?"
"Who the hell are you and what have you just done?"
The Doctor knew who he was. Amy knew who he was. Rory knew he was. It was Brian Williams. The man that wasn't in existence anymore and he had a message for the married couple.
"You need to go back!