A couple interesting things to note from the season 4 opener...
They made mention that the walkers have changed behavior. Instead of disbursing along the fence, they congregate together in clumps. Interesting to see where that leads.
Also, they're giving a hat-tip to real-life Daryl fanboyism by giving him a quasi-mythical status within the community. That seems on the one hand like a cheap patronizing handout to TV-land, and on the other hand, I can imagine a small community in their situation craving real heroes.
Also, what killed the young boy? Is this season's new enemy... some disease? Is the disease related to walkerism? Or something else entirely?
Also, since the meh season 2, I am usually pleasantly surprised at the writing creativity. Raining Zombies through the ceiling? Damn good imagination - totally realistic, what with the crashed helicopter on the roof.
Also, it looks like Michonne has finally learned a new expression beyond the untrusting scowl.
Overall, episode 1 season 4 sucked me right in.