The second episode of the series looks at dreams and tries to explain what happens in the brain and body after we go to sleep. It looks at the significance of dreams and what dreams can teach us about ourselves. It talks to neuroscientists who discuss slow-wave sleep and REM (rapid eye movement) sleep during which dreams occur. It looks at the history of dream interpretation and its validity.

As World War II drags on into another bitter winter the Allies become desperate to end the conflict. Winston Churchill turns to his formidable bomber force to break the deadlock.
The population of an eastern German city is caught in a devastating firestorm and harnessed by the Nazis; the controversy turns the Allies on themselves.

Our blue planet is facing one its biggest threats in human history. Trillions of pieces of plastic are choking the very lifeblood of our earth, and every marine animal, from the smallest plankton to the largest mammals, is being affected. But can we turn back this growing plastic tide before it is too late? Wildlife biologist Liz Bonnin visits scientists working at the cutting edge of plastics research. She works with some of the world's leading marine biologists and campaigners to discover the true dangers of plastic in our oceans and what it means for the future of all life on our planet, including us.
Liz travels to a remote island off the coast of Australia that is the nesting site for a population of seabirds called flesh-footed shearwaters. Newly hatched chicks are unable to regurgitate effectively, so they are filling up on deadly plastic. She visits the Coral Triangle that stretches from Papua New Guinea to the Solomon Islands to find out more from top coral scientists trying to work out why plastic is so lethal to the reefs, fragile ecosystems that contain 25 per cent of all marine life.

Could we get all our energy needs from sea water and the salt it contains? Are we to witness a time when salt will power our engines and factories, and light up our cities? Could this be the final curtain not only for shale gas and oil, but also the burning of fossil fuels and the beginning of a gentler form of energy that is definitely renewable? This documentary explores the latest research on sea water and the way scientists all over the world are working on 'Blue Energy'. This research could bring about a major change in our time.

Follow the true stories of five of the world's most celebrated yet endangered animals: chimpanzees, penguins, lions, painted wolves, and tigers. These five extraordinary animals are each engaged in a heroic struggle against rivals and the forces of nature, fighting not only for their own survival but also for the future of their dynasties. Narrated by David Attenborough.
In the first episode, we will explore the lives of a group of chimpanzees led by a male named David in Senegal, West Africa. He has already been alpha for three years - a time when leaders in this region are usually overthrown.

This episode delves into the captivating world of lions, and one of the most renowned lion prides in Africa, the Marsh Pride of Kenya Masai Mara. As the story unfolds, we find the Marsh Pride facing a unique and challenging situation. They have been left to fend for themselves, abandoned by all the adult males who had protected the pride. Witness their remarkable journey as they adapt, survive, and redefine the rules of life on the savanna. Narrated by the legendary David Attenborough, offers a mesmerizing glimpse into the lives of these majestic predators and their struggle for survival, making it a must-see for nature enthusiasts.