The four-episode series examines how people might cope in the aftermath of a natural or man-made disaster of epic proportions. What would life be like, for example, if we ran out of oil? Using re-creations and CGI animation, the series presents one scenario of a world with no food or electrical power. Or what could be the effects of the world's population doubling overnight? ``Aftermath'' takes viewers into cities with populations of 35 million, where water, food and power are in desperately short supply and mass migrations destroy nations.