His hearts lept to his throat and his eyes got very, very wide. He recalled now (and he had forgotten) that he and the Master had stood, carefully watching their doubles as they started to get more animated and raise their voices a bit. Hoping they wouldn't had to avert violence. Then the other pair had abruptly taken off. And they hadn't come back.
He was pretty near certain he knew what they'd been up to, now.
He took the Master's hand and said, soothingly. "I know. I'm right here. You keep talking to me. And I'll talk to you. It won't be quite so quiet, for a while. You will get used to it."