World War V

            Following two nuclear winters (which could be WWIII and WWIV) the last bastions of humanity eke out a living in slum-like cities and begin to rebuild their civilization.  When an army of radioactive vampires attack en masse, the humans must rally together to defend their ghetto while communicating via radio with other survival communes in an effort to keep the species alive.

World War IV

The female President of the United States and the Russian Premiere (male) threaten each other over a live video feed that allows them to communicate between their respective fallout shelters.  Of course, the worst they can threaten is to re-bomb already destroyed cities, as the entire planet has apparently already endured a nuclear holocaust.  Of course, neither side realizes the fact that unless the all-male Russian population gets together with the female Americans, humanity will go extinct.