The BBC’s most addictive reality juggernaut has always thrived on paranoia, theatre and a certain gothic campness, and now The Traitors has gone celebrity. The mechanics are unchanged: the Faithful must root out the Traitors before they are “murdered”; the Traitors must survive long enough to keep the pot for themselves. How ruthless can you be with Stephen Fry across the round table? If you’re a Faithful, you’re constantly worrying if you’ll be murdered. Can audiences really believe Stephen Fry as a backstabber?