Karen Gillan on Let's Kill Hitler monster, River's character

In an interview with Zap2it, Karen Gillan has revealed a few teasers for the next part of Series 6.

More on Let's Kill Hitler: "It's so good. The relationship between Amy and River is really explored, Alex Kingston gives an amazing performance, And there's a really interesting villain called the Tesselector (spelling unsure), and there's a really interesting concept behind that."

River's character: "[Her character] was as big a shock to me as it was to the audience," Karen says."Alex Kingston knew the whole time, the sneak."

The Amy/River relationship: "Motherhood would change any woman, so it's definitely going to be the same for Amy," says Karen. "We're just going to see that relationship really explored between River and Amy...and also, something really interesting happens to Amy, but I'm not going to tell you."

And on Amy's journey: "We met her as a child, we've seen her as a young woman, we've seen her run away in the Tardis, get married and now she's had a child," she says. "I would love to see her whole life play out, because we don't normally get that with a companion."