The Hunt 

Episode 4: Oceans - 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 macroscopic life. "Hunger at Sea" follows blue whales, sharks, lionfish, tuna, dorado and frigatebirds hunting flying fish, sea lions, dolphins and albatrosses to reveal the strategies they use to hunt for prey in the big blue. 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. The Sargassum fish relies on its camouflage amongst the Sargassum algae to sneak up on prey. In the deep sea, the squid Chiroteuthis attracts prey with bioluminescent lures while the ctenophore genus Beroe hunts other jellyfish.

Also: Flying fish, Pelagic red crab, Striped marlin and Sardine.

Episode 5: Plains - The open arenas of grassland and desert make up half of all land on our planet. In these exposed habitats, predators like cheetahs, bald eagles and lions can usually see their prey. But it works both ways: their prey can see them too. With nothing but open vistas, the element of surprise is hard-won, and predators must make their own opportunities.

Also: Guineafowl, Caracal, Honey badger, Termite, Snow goose, Cape buffalo, Ethiopian wolf, Mole-rat, Hotrod ants and Antlion larvae. 

Running time: approximately 1 hour per episode
Parental guidance - general viewing, but some scenes may be unsuitable for young children