Race Against Time (Coasts) • 2015 • episode "S1E6" • The Hunt

59:22

Liz Bonnin presents a controversial and provocative episode of Horizon, investigating how new scientific research is raising hard questions about zoos - the film explores how and why zoos keep animals, and whether they need to change to keep up with modern science, or ultimately be consigned to history. Should zoos cull their animals to manage populations? Liz travels to Copenhagen Zoo, who killed a giraffe and fed it to the lions, to witness their culling process first hand. They think it is a natural part of zoo keeping that is often swept under the carpet. Should some animals never be kept in captivity? In a world exclusive, Liz visits SeaWorld in Florida and asks if captivity drove one of their orcas to kill his trainer. But could zoos be the answer to conserving endangered species? Liz examines their record, from helping breed pandas for the wild to efforts to save the rhinos. She meets one of the last surviving northern white rhinos and discovers the future of this species now lies in a multimillion-dollar programme to engineer them for stem cells. Veteran conservation scientist Dr Sarah Bexell tells Liz the science of captive breeding is giving humanity false hope.

Horizon • 2016 • Nature

48:34

As snails surf the waves in pursuit of a meal, how do the tides create opportunities for marine life?

S1E7 • Blue Planet I • 2001 • Nature

46:25

Explore the wild blue Caribbean waters of Cozumel, a lush paradise packed with marine surprises. From the spectacular Paso Del Cedral coral reef to the world's longest subterranean underwater cave system, go where only the bravest divers dare venture.

4 • Great Blue Wild • 2017 • Nature

44:00

Take an epic voyage over the remote island nation of New Zealand, the last habitable landmass to be discovered on the planet. No bigger than the state of Colorado, this small country offers an incredibly diverse landscape view that changes dramatically with each mile. From snow-capped mountains to sandy beaches, and from the glacier-carved Fiordland National Park to the crater lake of Mount Ruapehu, New Zealand is a land of extremes. It's a place where fire clashes with ice and people are always pushing the limits.

2017 • Nature

43:37

As temperatures hit minus 60 food becomes scarce, and animals such as foxes and hares shed their colourful coats to camouflage themselves in the snow. The end of winter heralds one of the world's greatest feeding frenzies as large ocean predators target the millions of fish who have found refuge in the Gulf of Alaska.

S1E1 • Alaska: A Year in the Wild • 2017 • Nature

59:01

Finding somewhere to keep safe is one of the biggest challenges an animal faces. But some animals don't have to find a safe place - they build one. Chris reveals some of the best building animals in the world - a group that is incredibly varied. Accomplished animal architects include everything from beavers to bees and prairie dogs to bowerbirds. They don't only build homes, however - they also make structures to raise their young, store food, catch prey and impress mates. But what can be learnt from their building brilliance?

S1E3 • Chris Packham's Animal Einsteins • 2021 • Nature