Okay! A very strong opening for the second half of the season. I wouldn't be me if I didn't have some complaints, but I feel pretty happy with what I just saw, and I'm really excited to stick with these characters for the rest of the season.
Cons:
There were a few odd pacing/timing issues that I must mention. Particularly, there were scenes during the day and then suddenly it was night time, and I was forced to conclude unlikely things from that, such as the fact that Maggie was apparently stuck up on that tiny platform all day? Or that it took most of the day for Denise and the Wolf to try and make their escape? I don't know... maybe I'm thinking too hard, but these moments did take me out of the story a little bit.
Of all the many subplots and characters that this episode focused on, the only story that I didn't really enjoy was the one involving Carol, Morgan, Denise, and the Wolf. Basically, Carol angrily tells Morgan that she should have killed him rather than let him spare the Wolf's life. Now, Denise has been kidnapped. But meanwhile, the Wolf is actually seeming to soften, showing a more human side with Denise. He even goes back and saves her life when she is nearly overrun by Walkers. As a consequence, he gets bitten in the arm. As they try and rush back to the infirmary to help him, Carol shoots the Wolf from the window, freeing Denise from her captivity but also killing somebody who maybe wasn't all bad.