Underwater

This 105-minute wildlife documentary is a must see for all nature lovers but is also suited for scuba divers in search of new dive sites.

As scientific studies confirm sea level changes throughout the globe, major coastal cities like Miami are now fighting back against these rising tides, before it's too late. Parts of Miami Beach are under serious threat, with major economic and social dangers looming large.

Located beneath Russia's Ural Mountains, Orda Cave is legendary among divers for its unique beauty. The cave's waters are clearest in winter, when the land above lies frozen. With temperatures approaching minus 40 degrees, NHK attempts to film the cave for the first time ever. Scientists give them insight into the cave's origins, enabling the crew to uncover the miraculous story of how the cave was naturally formed 300 million years ago by climate change and a shifting landscape.

The 1982 film Das Boot, the story of the crew on a German U-Boat during World War Two, became one of the highest grossing German films of all time. The cast and crew discuss the making of Wolfgang Petersen's claustrophobic epic, a landmark in German cinema.

Dr Richard Harris takes us on a journey of the cave network underneath the Limestone Coast in South Australia. See fossils hidden for millenia and hear tales of an ancient world.

"Wild Indonesia" presented a particular logistical challenge for us. How to cover 17,000 islands spread across an area stretching from New York to London. Once we'd figured that out, we were then faced with how to access the animals there, many of which were rarely seen, let alone researched. As we had tied ourselves to telling the story of Indonesia's evolution, we had to make sure we did every island and every species' story justice. Obviously, we couldn't cover everyone, but we certainly had a go. The series has one of the highest species counts of any I have ever worked on.

Blue Whisper immerges into the ocean's fascinating underwater world and gets to the bottom of a widely unexplored field of underwater science: the communication among fish. The documentary accompanies a team of specialists to overwhelmingly beautiful coral reefs, ancient shipwrecks in the Mediterranean Sea and sunken submarines that are clouded in secrecy, to explore the versatile forms of underwater communication. What language do fish use? Do they make sounds? Do they have a body language? And what role do colours play?