Brinens and Things
I get the feeling it wasn’t planned this way.

I don’t think they’d assume the viewer is going to be a: up on Whovian news and b: faceblind.

But I am, and so for me it follows a pretty standard plot twist progression.

First, Hmm, she looks a bit like Jenna-Louise Coleman.

Shortly after, Have I heard Jenna-Louise’s voice? Did it sound like this? I think it might have.

Shortly after that, She talks so fast. Didn’t they say that was one of the things they really noticed about her? How she talked so fast he could hardly keep up with her?

At the end of the episode, watching the credits:

Oswin

Jenna-Louise Coleman

Ha! Now what does this mean for the future plot?