absolutely awesome the first 3 seasons Let me start by saying that at first I had my doubts about this show. At first it sounded like a typical space opera with the usual not so deep story line. The "hero" is annoying, the typical actor chosen for every American series. But if you are like me, just forget about the main character, watch at least 3 episodes and you will probably be hooked. Well, 5 thousand years ago a book was written, the I Ching. And one of the things it says is "good cannot destroy evil, only evil can destroy itself", which is what happened in "The Lord of the Rings", where Gollum is the unexpected solution and Harry Potter, Valdmort ends up killing himself. You used the same promise here, and maybe that is why it worked so well. Another thing I liked is that you can't really understand the aliens here, but you can sort of feel them. I loved it, thank you for surprising me at a time when everything seems old and tired. Now about the other seasons , 4, 5, and 6th , its another show , the actors are the same but it lacked a good story , it 's like they had it all prepared for only 3 seasons and did not know what to do with the rest.