This film investigates the parallel stories of collapsing Pacific salmon populations and how biologists and engineers have become instruments in audacious experiments to replicate every stage of the fish’s life cycle. Each of our desperate efforts to save salmon has involved replacing their natural cycle of reproduction and death with a radically manipulated life history. Our once great runs of salmon are now conceived in laboratories, raised in tanks, driven in trucks, and farmed in pens. Here we go beyond the ongoing debate over how to save an endangered species. In its exposure of a wildly creative, hopelessly complex, and stunningly expensive approach to managing salmon, the film reveals one of the most ambitious plans ever conceived for taking the reins of the planet. Watch the full episode. Buy the DVD. This film premiered May 1, 2011. (Video limited to US & Territories).

Follow individual koalas from a small social group on an Australian island to learn just how a koala manages to survive and thrive on a diet poisonous to almost all other herbivorous mammals. From the miracle of marsupial birth to tender moments of discovery between mother and newborn joey, encounters with threatening forest creatures, battles between rival males and the complex chorus of bellows and grunts that have become so important to science — join leading scientists as they unravel just what a forest needs to support a healthy population of koalas by listening to these marsupials themselves and cracking the koala code. Buy the DVD. This episode premiered May 16, 2012. (Video limited to US & Territories).