Warner Bros. has been keeping us entertained by releasing tidbits from the extended special features available in the Harry Potter Wizard’s Collection,  out Sept. 7. This particular video shows a section of an interview between Daniel Radcliffe and J.K. Rowling that reveals Rowling’s thought process for some of Harry Potter’s plot. The video and information come from Snitch Seeker.

Daniel Radcliffe: In the fifth film, you came to the set, and we had probably had the biggest talk about the character, even though it wasn’t major thing, but I was asking you questions about the relevance of Dumbledore’s Army and how important that is in terms of what will happen later. I remember what you said to me, that it’s very important because at some point Harry will have to lead large numbers of people.

J.K. Rowling: Yeah, the only real resistance, the only organized real resistance. I always knew the final battle would happen at Hogwarts. So that’s where all this was working towards. Along the way I had to set it up so Harry could become a leader of some form of resistance movement, because it was far too implausible. I remember that talk – I remember that talk vividly.

Dan: And on the wall, in my room, I had just done a big project where I had taken pictures of lots of authors off the internet and written little biographies about them underneath and written their names. I can definitely remember you picking out one.

Jo Rowling: It was George Eliot.

Dan: Let’s talk about the relevance of George Eliot.

Jo Rowling: When I was looking for maiden name for Lily, I chose Evans on the basis that it was George Eliot’s real name.

Dan: See, that’s wonderful. I don’t think anybody knows that.

Jo Rowling: No, it was just one of those – it was quite random things, but sometimes, for strange reasons, you use a name that always thereafter means more to you than it does to anyone else. Yeah, I do remember that.