Martin Clunes travels to the island to meet conservationists trying to save its declining population of lemurs. He learns about efforts to protect the greater bamboo lemur, one of the world's 25 most endangered primates, and finds out how rice cultivation is threatening the habitat of another rare breed. He then heads to the nature reserve of Betampona hoping to track down lemurs bred in captivity, which were flown from America to Madagascar between 1997 and 2001 to expand the gene pool.