Medicine Men Go Wild is a major new four-part documentary series in which two young British doctors, Chris and Xand van Tulleken - who also happen to be identical twins - immerse themselves in radically different cultures in four of the most extreme places on earth.

The twins explore the world of tribal medicine, and experiment with body mutilation, hallucinogenic plants, toxic potions and the superstitions of Shamen to discover whether traditional forms of healing have anything to teach us about curing illness. In the first programme Chris and Xand travel to equatorial Africa - one of the most disease-ridden places on earth - to live with the Bayaka Pygmies who inhabit the densely forested, swamp infested Congo Basin.

It is a singularly unforgiving environment, yet the Bayaka have thrived for tens of thousands of years in a place proven to be the incubator for the most deadly diseases known to man, including Ebola and HIV.

Tuesday 22 January 2008, Channel 4, 9PM