Widely considered one of the last great frontiers in medicine, blood cells literally hold the secrets of life and death in them – be it stem cells or cancer cells. This new medical-themed documentary explores the mysteries of human blood, following the lives of hematologists – doctors and researchers alike – making new discoveries about this unique, life-giving substance. Through stories played out in hospitals and laboratories around the country, these doctors are lured into the role of detective – uncovering meticulous clues and piecing together bits of information that could save lives. This hour-long piece follows the best in the field as they pass on their knowledge to new doctors and patients – and sometimes race against time – in an attempt to better understand this odd inner landscape, and make a difference in the world around them. Premieres December 19, 2008 on Discovery Health.