Season 1, 2 and 3 are all 8/10 seasons, but season for brings the whole series down and is only a 5/10 season at best... season 4 has multiple plot holes in multiple episodes and is honestly a disappointment. The only solice is that season 4 isn't connect to the other seasons at all in the story, and so you can just skip season 4 entirely and only watch the other seasons of the series and you'd be much better off that way.
