"He doesn't know anything except loads of really useless facts, and everyone thinks he's bonkers," says Izzard. "Then he becomes bonkers-but-useful, because if you grab his hand he experiences visions which can help you find something you've lost. Eventually there are cathartic resolutions of these losses and the conflicts between the characters. I think it's a beautiful little gem of an urban fairytale, and it's some of the best work I've done."