With an estimated one surveillance camera in Britain for every 14 Britons, reality television has never been more invasive. The reason Big Brother has been allowed to watch its citizens so comprehensively in this way rests with the claim that CCTV is a protection rather than an intrusion. Only the guilty should fear the all-seeing eye. Those with nothing to hide have nothing to worry about. It is tempting to imagine this is what Calvin’s Geneva might have been like if only the technology had been the equal of the theology.