As much as the writers want us to care about the characters alongside the zombies, it's not helping much. After two episodes with great focus on the characters, I still don't care too much about them. It surely doesn't help that most of the dialogue is a variation on "look around us, we're fucked."
The plot this week revolves around Carl getting shot at the end of last week's episode. We meet the Greenes, and luckily Hershel is a doctor... of animals. Rick and Lori fight, Shane and the new guy Otis go to get medical supplies, and the rest of the people meet Maggie, who's riding on a horse, then make it back to the highway. There's okay stuff in there, like Rick and Lori's conversations, but nothing exceptional.
The cold open of the episode was Lori talking with a friend about her marital troubles before Shane pulls up to tell her about Rick getting shot. It mirrors the conversation Rick and Shane had at the beginning of the pilot, and doesn't add anything particularly new. It's not exciting like a zombie opening would be and it's doesn't shed light on anything either.