Highest critical review ratings for a TV show

The first series of the ITV drama Downton Abbey scored 92 out of 100 on Metacritic, making it the highest-scoring reviewer-rated show of the year.
The series, conceived and written by the actor Julian Fellowes (UK), follows the lives and loves of those living upstairs and downstairs in the estate of Robert, Earl of Grantham from 1912 to ­1914.