In 1971, the Shah of Iran, the self-proclaimed 'king of kings', celebrated 2,500 years of the Persian monarchy by throwing the greatest party in history.

Victoria Gill joins scientists in Antarctica as they begin to analyse their findings after a year spent monitoring the lives of thousands of penguins.

A physician in Michoacán, Mexico leads a citizen uprising against the drug cartel that has wreaked havoc on the region for years. Across the U.S. border, a veteran heads a paramilitary group working to prevent Mexico's drug wars from entering U.S. territory.

Who is the bloody figure wielding a meat cleaver, seen racing through the alleys of British Columbia's Chinatown?

Monty Don returns to help more amateur horticulturists transform their small or average-sized plots into something extraordinary.

More than 80,000 young people in the UK experience homelessness every year. Charlene White meets some of the desperate young people sleeping on the streets and on friends' sofas, and investigates the housing pressures that have left this generation struggling to make ends meet.

A nature documentary series written and presented by David Attenborough, that looks at the evolution and habits of amphibians and reptiles.