Okay, Captain. Release her now, or I take down the whole Teselecta.
It’s easy to forget, in the midst of all the chaos, that Amy was looking for her baby a few hours earlier. Now the Doctor tells her that her baby is there, except, she’s not a baby anymore. “She’s your daughter,” cries the Doctor, and it’s as if Amy has heard it for the very first time. You can see the pain and the sadness, the realisation that she will never see her baby again. That part of their story is over, but her daughter is alive, she’s River, and she’s being hurt. No longer in doubt, Amy’s sorrow turns into ferocity—“Release her now, or I take down this whole Teselecta.”