More spoilers and final thoughts

Chris4: Your character keeps the Scoobies grounded, which is badly needed, especially with Tara gone. Will we be seeing more of you in season seven?

Tony Head: Joss very sweetly went on record as saying he'd underestimated the role my character played and that he wanted me for season seven. We were originally contracted [for me] to do at least ten [but] I think it'll probably work out at slightly more than that.

I think it actually worked out for me to leave in season six and leave them on their own, just because it meant there were several places they could go to. I think it's also fitting that I'll be around a bit more again. The current plotline has got them all over the place, and it's also that thing - who can you trust?

Who is who they are meant to be? The people you most want to trust are the people who let you down. The seventh series is very interesting. When [Joss] pitched the storyline, I thought "Wow, that's perfect". It also gives us an opportunity to see a lot of people we loved from the past coming back.

Lerena: Giles is such a richly textured character, and he's come such a long way since season one. Is there any one thing you'd love to see Giles to do/experience that he hasn't already?

Tony Head: He never truly went bad. I pitched that for years, but Joss said, "Just let it go". We don't know at the moment whether I'm bad or not. He never really manifested himself as the villain.

I suggested when I was talking about leaving the show, it was because I could be the baddie. I actually used to play a lot of baddies and now I don't play so many. It's always fun to play baddies Who knows what will happen? And if we ever get to do it, Ripper has a darkness about it in Joss' original brief that will be interesting.

BBC_Host: And here's Anthony with a final word...

Tony Head: Thank you for the questions. I love doing online chats because you get questions from fans - specific questions - and they are by and large more searching than your average journalist's questions, because there's no pitch or angle.