[ Alright, it's apparently lesson time. That's okay, she can figure this out with a little guidance.

She finishes the doughnut and swallows, nodding along. ] Parallel universe. So everything's the same, only different. Different Earth, different everywhere.

[ And this is when it starts to dawn on her. ]

But the TARDIS... is back on our Earth.

[ There's a big frown growing on her face. She doesn't like the sound of that. ]

...So we're stuck here.