Matthew Pinsent tours the world in search of aspiring Olympians. He heads to Usain Bolt's home town in Jamaica, before meeting the taekwondo fighter from Afghanistan who has become a symbol of hope in a nation which has rarely seen fighting as something to celebrate.

Finally Matthew heads to Korea, where he catches up with a rower from Iraq, who has one final attempt to qualify for the London Olympics. Elsewhere, Kosovo's top athletes lament the fact their sporting dreams have been crushed by international politics. Show less