Four months after the BP oil spill, Stephen Fry returns to America's Deep South together with zoologist Mark Carwardine, to see what the impact has been.

Stephen Fry loves Louisiana. Four months after the BP oil spill, dubbed the worst ecological disaster in the history of America, Fry returns to the Deep South together with zoologist Mark Carwardine, to see what the impact has been on the people, the vast wetlands and the species that live there. What they find both surprises and divides the travelling duo.