So what happens when civilization breaks down? Abby insists that people are basically good, but the struggle for survival demonstrates what people are really like, and her belief is tested daily by other survivors who are driven by greed and self interest. The last-people-on-Earth drama is an old idea, but it's always interesting when it's done right. Eliminating social conventions, law enforcement, and morality brings out both the best and worst in people and creates high-stakes drama as individuals discover what they're capable of doing to survive.
This thought-provoking British drama is done right. The few survivors are surrounded by what was, until quite recently, a thriving civilization and now have their pick of huge mansions and fancy cars. But the electricity has failed, gasoline is increasingly hard to come by, and few things are as valuable as canned food. Each character is separate and distinct, and they all have very different ideas of how to get by in this strange new world. Some, like Abby, assume that everyone should help each other, while others, like Tom and Sarah, think of themselves first and are very aware that they can't count on anyone else to watch their back.