"I suppose I should thank you," the Master said, on their second day aboard the Valiant. "None of this would have been possible without your help."
The Doctor kept his silence.
"If it hadn't been for you, Britain would still be heading into a golden age under my predecessor. I would have had a much harder time gaining a foothold." His smile grew vicious. "But you decided to throw that glorious future away in a fit of pique, a moment of petty self-righteous indignation."
He swept his arm toward the devastation below. "All of this, because you spoke six words."