On the Fields of Trenzalore,

"Terry!" The Doctor shouted as he ran forward, face pale. The Time Lady slowly lifted her head, a tiny smile of relief on her face.

"Just in time." She managed to gasp, before her legs gave out beneath her and she fell, clutching her bloodied chest.

At the fall of the Eleventh,

"Doctor!" Terry cried, eyes wide and terrified. Terrified he was really going to die. Terrified he was leaving forever. Terrified she couldn't stop it.

Closing her eyes, she whispered… pleaded...

"Please… save him."

When no living creature can speak falsely or fail to answer,

"No, angel, what are you doing?" The Doctor asked, afraid, and she smiled sadly at him.

"I'm sorry, Doctor." She answered, drawing away without his usual kiss to the cheek. "I'm doing what you told me never to do again. I'm saving your life."

A question will be asked,

"Doctor?"

A question that must never, ever be answered

"Doctor who?"