It's ok that some characters go away for a while, but new characters unfortunately don't yet look promising. The whole episode had like 10 minutes of action? The rest... I don't even remember what happened in the rest of it. I really loved seasons 1 and 4, and I wish series could go back to having 3-4 exciting cases in each episodes, during which characters could be developed much better than when they just talk and talk and talk about their issues. Also, I miss badass Athena on the streets.