I forgot the names of the episodes, so I'll describe what they are as best I can.
Let's get into the bad first. One thing does bother me about the third season and it's that there's less different art styles than the past seasons of it. I don't know if other people get bothered by this too. And the endings of most of the episodes of S3 are... I'll get into that later.
Now the good; I think my most favorite stories come from this series and some of the CGI here is scarily too realistic. Some episodes it's extremely hard to tell like the episode before Jibaro and the episode with the giant carcass being observed.
Now into the stories. One of my favorites is the episode with the Russians trying to take out the hive and have to use desperate measures. We, the audience see that there isn't much hope, we aren't blasted with information right off the bat, we just see these creatures devouring humans as they go. The Russians have no other option but the nuclear and send one of their own in to plant TNT traps. Long story short, everyone dies except for one survivor. I think that one survivor aspect makes something like in most of the episodes of season three differ. That one thing just makes the alien race that kills everything in its wake is kind of depressing. The one survivor just makes at least a little hope.
Another story, or stories I want to talk about are the philosophical ones like Blue and the giant's corpse. Those episodes aren't that action-y, instead, they make you think if your life is actually worth it right now. Blue is about a robot that's basically god, but decides by its own to go back to its original form. It's like dying in your home town that you grew up in. It's heartbreaking, but that's the way that you wanted to go.
The giant's corpse is about a man who is studying a giant corpse. Nobody knows where it came from or how it came to shore, but as we see in the episode, it's treated like a monument at first sight. There are people climbing on it and more and more time passes by, I think it was 3 months, and there's none but one person still on it. Instead of playing around, she reads a book by herself. I think this is a metaphor for those who just want to be left alone at a place like New York or Los Angeles. The body is rotting by this point, and the person who observed it now has an older look to him. By the end of the episodes, all of the body parts that stayed mostly intact, including the dick, had been put in sight-seeing places like bars or museums. Instead of them treating it like an alien thing and studying it as much as possible, they just do that. I think that what that means is that you don't have to learn about the universe to understand that everything is, and will be repurposed by other opinions.