AllMovie

This four-volume series from PBS Home Video explores the millions upon millions of unseen neighbors who share our homes and even our bodies: microbes. Scientists explain why we can't live without microbes even though they often make us sick. As the first life form on Earth the microbe was -- and continues to be -- the basis of the Earth's food chain, in addition to being responsible for the production of the majority of our planet's oxygen. This series examines the accepted scientific notion that all life on Earth depends on these tiny creatures. Intimate Strangers: Unseen Life on Earth, Vol. 3 -- Dangerous Friends & Friendly Enemies examines the love-hate relationship that exists between humans and microbes. Though responsible for plagues that have killed millions, these tiny cohorts have also helped keep us alive for millennia. Scientists explain the pros and cons of our tiny companions.