"She's the reason Koschei's dead." The Doctor's tone was clipped, his shoulders rigid. "Ended the Time Wars, oh yes." His eyes flashed with derision. "And I don't even have a body to burn for it."
He walked a little faster, hunching forward a bit. "Not the second time I lost him to the Daleks. At least he made sure they'd never come back, not again. He was always better at plans than I was."