A month after his victory, Barack Obama discovered America was on the verge of a great depression. He puts his plans for change on hold to pass the largest stimulus in history.

With exclusive interviews from president Obama and his White House team, episode two tells the story of Obama's greatest legacy: healthcare.

Episode three explores how Barack Obama set out to end George Bush's wars in the Middle East and reset relations with the rest of the world.

The last instalment of this definitive account of Obama's presidency tells how Obama got re-elected for a second term and tried to tackle America's most intractable social problems - guns, immigration and race.