[cross posting from my goodreads, with some changes]

A big step down from ‘Vampire Science’, but a nice story.

Some of the descriptions of the Zygon ship left me a bit confused, and I thought the whole subplot with Jack and Albert was completely unnecessary and pretty boring. I’m still not crazy on Sam, but i’m giving her time and hope she’ll grow on me. After all, I can’t complain that a teenager (btw, Doctor, she should be in SCHOOL) acts very much like a teenager; she wants to be tough and cool, and is trying way too hard. Doesn’t help that for all of this story she has nothing to do; even she comments on it. Give this girl a win so she can calm down!! I'm missing that 'dynamic duo' feeling that we get when the Doctor and his companion(s) are in sync, ya know?

The twist with the Doctor accidentally killing all the Zygons was shocking and had some weight, but I think it should have been way more dramatic. I felt that they all forgot about it too fast. I was hoping for an epilogue with him and Sam talking about it, or at least something showing he was very troubled by what he did (by accident, which I don't even if makes it better or worse!!!), but no dice. Oh well. Can’t say that’s not in line with classic who, though.