Tropical rainforests are the most diverse ecosystems on the planet; that means intense competition. Crocodiles in the mangrove forests of Borneo are drawn to the rich variety of species on offer.

From rivers to oceans, water wars rewrite the rules of conflict; gravity has no meaning underwater. Weird and wonderful creatures of the reef terrorise each other as they battle for an inch of space.

We dive into the planet's fiercest aquatic battlegrounds. From jaguars hunting caiman in the Pantanal to venomous platypus duels. Across continents, creatures fight to rule their watery domains.

Shondie tries to help a calf that has been injured by his own mum, David is called out to see a rare breed of sheep called Zwartbles, and Guy tries to resolve boxer dog Maddy's ruptured ligament.

Arlie constructs an ingenious new invention to help catch gators - but the results are mixed - Shannon charms a shy gator, and trouble is afoot for Arlie and Jessica away from the park.

Mother Nature governs the unwritten codes of survival that dictate the way of life in rural Alaska. At each camp, the residents face challenges securing basic necessities of life.

The Hailstones hunt for springtime waterfowl, and welcome a new addition to the family. Andy must also protect his property from the breaking ice on the Yukon River.

Spring is coming, and in Kiwalik, the Hailstones go on a hunt for caribou before the region thaws completely and they are unable to cross the river.

It's the end of the Kimberley's hot season. As Wilakarra, the rainy season, returns and revives the Martuwarra/Fitzroy River, Nyikina man and actor Mark Coles Smith goes to explore its remote reaches.

In the season of Koolawa, thousands of migratory birds fatten up on the world's richest intertidal mudflats. And the cool dry season of Barrkana brings humpback whales to near-pristine coastal waters.

The cool season ends, and savanna gliders explore the canopies of the savanna. The growing heat of Wilbooroo dries the wetlands, and forces crocs into overcrowded rivers, sparking territorial fights.

Isolated since the time of the dinosaurs, New Zealand's wildlife has been left to its own devices and its forests are stalked by predators from the Jurassic era.

From hyper-intelligent parrots to sinister snails and magical constellations of glow-worms, this is the story of New Zealand's wildest places and most resilient pioneers.

The latest custodians of Chavenage House in the Cotswolds bring modern ambition to a newly inherited home. At Ashby Manor House, plans are afoot to revive a Tudor room tied to the Gunpowder Plot.

After 25 years of neglect, Pitchford Hall has returned to its original family, who now face a huge restoration task. Plans progress at Ashby Manor to revive the Gunpowder Plot Room.

Titanosaurs are the largest animals ever to walk the Earth; palaeontologists explore their gigantic fossils to discover why they grew so big.

A team in South America uncover the bones of a rare armoured dinosaur; could it be a missing link in the evolution of the ankylosaurs?

This episode introduces lions with distinct personalities and follows them as they hunt and explore new territories, but conflict arises when the mothers return with new cubs.

Hunger drives the cubs to violence and family relationships are complicated; the lions rely on the more agile lionesses for hunting and face challenges such as climate change.

Oloborr emerges as the leader of a pride which mainly relies on buffalo for food; as it faces obstacles in establishing dominance, tensions arise within the group.

It's the end of the Kimberley's hot season. As Wilakarra, the rainy season, returns and revives the Martuwarra/Fitzroy River, Nyikina man and actor Mark Coles Smith goes to explore its remote reaches.

In the season of Koolawa, thousands of migratory birds fatten up on the world's richest intertidal mudflats. And the cool dry season of Barrkana brings humpback whales to near-pristine coastal waters.