I Chose Us
"Comes with the territory," the Doctor said, and she could easily believe that. Moments before, there had been a look in his eyes unlike any she'd seen before. Moments before, he had killed off an entire race. Set fire to the nest and watch it burn. That's what he had done. And she had let him.
She frowned.
"Not ideal, I know. But... someone has to do it."
"Why?" she asked, surprising even herself.
"Why what?"
"Why does someone have to do it? Why can't we just let them live? What's the harm?"
The Doctor stared blankly at her, and then seemed to return to his body and shrugged.
"Come on. There has to be a reason."
"There isn't, Donna. This is just... it was us versus them. And I chose us."
"But it's unfair."
He nodded. "Yeah, it is. It really is."
fin.