This is the first episode in which we actually see some human characters being eaten by the walkers.
This is the second AMC show to feature a Winnebago. The model that appears in this episode is from the late 1970s. AMC's Breaking Bad (2008) features a larger but later model, built in the 1980s. However, the use of the vehicle ended in the third season when it was crushed at a junkyard.