This is a show that does a lot of interesting things in the marvel universe. It explores the more behind the scenes of a world that has known about super powers and alien tech for decades. Some seasons are noticeably better or worse than others and it is not a gradual decline or increase in quality, so it is better to keep watching, if you don't like a season skip it over for the next. I personally thought season 3 was the worst and and 5 the second worst, though 5 was mostly for the tone and lighting.

Season 5 suffers from being poorly lit, it may be they were trying to get across just how hopeless the situation they were in was, but I just wound up being unable to see much of what was going on. I know they did it on purpose and it wasn't just incompetence from the crew because there are some scenes which are very well lit and quite beautiful to see, but only in two or 3 episodes and then only briefly. It didn't help that season 5 seemed to drag on and take itself too seriously, something the show tends to do too often, sci-fi and super heroes don't need to be comically light hearted but I do prefer more of the excitement and entertainment rather than relentless drama depicted in this series.