As Glenn says, "people are scared," and with good reason to, if the number of walkers that appear to be making the way into (or are already inside) Alexandria is anything to go by. He also tells Maggie that she should keep an eye on someone, although it isn't specified who exactly. There's also Aaron getting surprised by someone who seems to have a sword on their back (is it just Michonne, or another, less-heroic sword-wielding character?), and Carol pensively talking about how Deana was in charge, but now Rick is, with a couple of significant looks between Rick and Morgan, in a scene that appears to come before the previous one of Morgan talking about Rick.