Great acting and plotting. Characters are consistent and interesting. The theme that centers on the power struggle among earth, mars, and the belt is a brilliant concept and the writers intelligently sustain the tension between leaders and the main characters in these culturally very different regions. In spite of outrageous cataclysmic events, I’m into season three and so far it hasn’t jumped the shark to become so unbelievable as to be unwatchable. Right up there with best sci-fi.