5/5. Deserts are our most varied ecosystems. Here are sandstorms nearly a mile high and desert rivers that run for a single day. First shown on BBC1

6/6. Jenny Matthews , Tom Hunter and Roger Hutchings photograph the mystical West.

The unearthing of lost works of Greek literature giants, and records of daily life.

New. 1/6. The best of modern British architecture, starting with the man behind Centrepoint. Frank Lloyd Wright - Murder, Myth and Modernism is on Thursday at 9pm

New. A war-torn year in a Colombian district is chronicled by Storyville.

How America uses the army to fight its "war on drugs" against Colombia.

double bill <S)