So, I'm going to go over on Angel. Joss is just going to find a way to keep me bleaching my hair, which is fine.

I patterned the accent after this guy I was in a play with, but that was three years ago. Now I'm listening to Tony Head (Giles in Buffy), who sounds kind of like Spike in real life. It's much more tough-guy talk in real life. His accent (as Giles) is just as fake as mine. His is nice and gritty, but it's not North London. I'm always afraid that I'm morphing over into Tony Head, wherever he's from.

For me, chemistry is trust. If you have trust you can risk together. It's like a partnership and it means you can have fun together while jumping off a mountain. I have not always been able to get good trust with an acting partner. One of the best was Juliet Landau; I always felt safe with her. Chemistry has nothing to do with physical attraction - that often gets in the way.

Andy [Hallett] was a real man - you can tell an adult by how they deal with pain or adversity. Andy's eyeballs gave him searing pain all day every day because of the contacts they used. He was every moment a gentlemen; laughing and joking, wiping the tears from his eyes.

Clowns make me... Think.

Joss Whedon said to me, 'If you think you are taking over the show, you have got another think coming.' He said, 'You are here only because I don't want to kill a villain off every week. I want my villains to be more interesting and multifaceted and then die.'

I'm a psychopath, but I don't have a problem with that.