Shame he's quitting but I don't think it was ever on the cards that he would be staying until the Z series, if they continue to make a series each year he'd be nudging 73 by the time that comes around. It won't be the same without him, a large part of the programme's appeal is Fry's banter with Alan Davies. We'll have to see if Sandi Toksvig makes a fist of it, if she doesn't and the Beeb start losing viewers I can't see it lasting to be honest.