"Won't forever," the Doctor replied, letting out a sigh. "Once things start to fall apart around him, he's going to look for someone to take it out on."

He turned his head, then, and looked over at the Master. He could barely see him before, he was so tired. The Doctor didn't get a chance to take him in, to see him so very alive in front of him. He grieved for so long without the Master. He couldn't fathom a world without him. But he was back, and it was thanks to the Valeyard.

"At least he did one thing right," he murmured.