Hunger at Sea follows blue whales, sharks, sea lions, frigatebirds, dolphins and albatrosses to reveal the strategies they use to hunt for prey in the big blue. The open ocean is an immense wilderness that covers more than half the surface of our planet, yet for the most part it's a watery desert, largely devoid of life. Predators face an endless search to find and catch food, yet these great tracts of ocean are home to some of the most remarkable hunters on the planet.

Director Chris Bell turns his camera on the abuse of prescription drugs and, ultimately, himself. After witnessing friends and relatives face tragedy as they become addicted to prescription drugs, Bell sets out to explore the goals of pharmaceutical companies and doctors in this ever-growing market, and asks how they are any different from back-alley drug-pushers. His journey leads to experts on the nature of addiction in our culture, as well as to pharmaceutical whistleblowers that testify to the solely dollar-driven aims of pharmaceutical companies.

In the fourth episode, leading landscape photographer Peter Eastway follows in the footsteps of Frank Hurley – the pioneering Australian photographer on Shackleton’s expedition to the south a century ago – to capture the wilderness and wildlife of Antarctica and South Georgia.

In the fourth episode of the series, an unexpected confession casts doubt on Steven's role in the murder case, but the new suspect gives conflicting accounts of what occurred.

David Attenborough concludes his epic history of the evolution of flight with an exploration of the highly advanced fliers that dominate our skies today – the extraordinarily diverse skills of the birds, and the sonar-guided precision of the bats. He encounters some of our planet’s most remarkable fliers – from peregrine falcons dive-bombing starlings over Rome, to hummingbirds hovering in the cloud forests of Ecuador. In a spectacular finale, he visits Gomantong cave in Borneo to witness the mass exodus of a million bats.

On a vast plateau cradled in the heart of the rocky mountain range lies two million acres of unspoiled wilderness, never farmed and never fenced. Canyons, lakes, rivers and mountains, a refuge for magnificent animals and a spiritual sanctuary for generations of Americans, all resting on the largest super volcano in North America. This is Yellowstone, America's first national park, a raw and powerful beauty that truly comes to life through immersive 3D.