Narrated by Sir David Attenborough. Witness the planet's most breathtaking natural events, and follow the dramatic wildlife stories behind them. Combining the epic cinematography of Planet Earth, with all the emotion, intimacy and storytelling of a wildlife diary, this series charts the effects of global climatic phenomena which transform entire landscapes, drawing in thousands of animals and determining their fate. Each episode is set in a different part of the world; from the great flood of the Okavango delta to the plankton blooms of the Pacific Ocean, and from the Indian monsoon to the race for survival triggered by the annual Arctic melt; and shows how immense natural forces, often starting thousands of miles away, drive a chain reaction that culminates in a spectacular wildlife event. For some animals, it's a window of opportunity, but for others, it's the most dangerous time of their lives. Follow their emotional, involving stories to a dramatic climax where their fate will be revealed.