Episode description
The hunt for Bin Laden in the mountains of Afghanistan; a Ku Klux Klan trial in 1965; the siege of Kut in World War 1; an unexpected alliance in 1980s Britain with Lesbians and Gays Support the Miners; and seminal alternative rock band the Velvet Underground's first gig.
(Photo: Afghan fighters look out over a smoking valley after a US B-52 aircraft bombed a front line position in the mountains of Tora Bora in north-eastern Afghanistan. Credit: Associated Press)