Knock Knock.

"Doctor," I heard her say.

Knock Knock.

"Please don't leave me."

Knock Knock.

"Please," she repeated. I turned away, crying.

Rory ran to the door.

Amy and Rory's hands touched, and she cried.

"Don't open the door. If you do, I will come."

She turned, this time not fighting the robots.

Rory started to cry. 

"You knew we couldn't take them both, didn't you?" he asked.

I nodded, tears still streaming down my face.

All I could think about was

Knock Knock.