Super Bowl XLVII: how to watch and what to watch out for

Nobody does grandiose sporting spectacles quite like the Americans, whose annual Super Bowl extravaganza attracts massive audiences from all over the globe. This year's title tussle isn't short on dramatic storylines -- with two brothers in charge of the finalist teams and a legendary linebacker making it his swansong game -- but a great many people will still be tuning in primarily to check out the exorbitantly expensive half-time ads. You can track all the fun and frolics of those commercials ...