BBC Earth

Simon revisits the incredible characters he's met during his travels.

Grab your rain gear when Simon journeys to Papua New Guinea. Meet a dazzling array of insects, brightly coloured birds, and slithery snakes as Simon scrambles through the dense, sopping wet jungle in search of the ultra-rare tenkile tree kangaroo.

Simon travels from the Arctic islands of Svalbard to the icy wilderness of Lapland.

The jungle, underwater caves and lush everglades of the Yucatán shelter Mexico's largest predator, Morelet's crocodile.

Hope gets hurt; an owl gets a nasty welcome back to the wild.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

In the heart of central Mexico, lies Sierra Gorda, a region that is home to bobcats, pumas and flying squirrels.

Hope gets hurt; an owl gets a nasty welcome back to the wild.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

In the heart of central Mexico, lies Sierra Gorda, a region that is home to bobcats, pumas and flying squirrels.

Hope gets hurt; an owl gets a nasty welcome back to the wild.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

Pursued by a group of Utahraptors, a gang of armored dinosaurs battles to reach adulthood.

Revealing the story of the British teenager whose AI girlfriend encouraged him to try to kill Queen Elizabeth II.

Injured wild dog Flint helps care for Storm's largest ever litter of pups; leopard Mutima searches for a home; the lions are challenged by forces beyond their control.

Simon revisits the incredible characters he's met during his travels.

Grab your rain gear when Simon journeys to Papua New Guinea. Meet a dazzling array of insects, brightly coloured birds, and slithery snakes as Simon scrambles through the dense, sopping wet jungle in search of the ultra-rare tenkile tree kangaroo.

Simon travels from the Arctic islands of Svalbard to the icy wilderness of Lapland.

In 1996, NASA scientists made a shocking announcement; they claimed they had found evidence of alien life in a meteorite from Mars. This film tackles one of the biggest questions in science - whether there is, or ever was, life on Mars.

Brian Cox explores the fundamental properties of light; the secrets of the cosmos.

Explore the frontiers of technology and science that are changing the way we perceive our place in the universe.

In 1996, NASA scientists made a shocking announcement; they claimed they had found evidence of alien life in a meteorite from Mars. This film tackles one of the biggest questions in science - whether there is, or ever was, life on Mars.

Brian Cox explores the fundamental properties of light; the secrets of the cosmos.