BBC Earth HD

'S1/E2'. Sir David recreates Agatha's 1922 journey to Tasmania and Melbourne - from a jam factory to a power station and a vast homestead.

'S4/E4 - Revisit: Utah'. Ben makes an unprecedented third visit to see his old friends Bill and Bob, elderly twins living in the canyons of Utah, and realises that their paranoia about the outside world has grown.

'S12/E15 - Rising Waters'. Alaskans must rely on family to overcome rising waters as they seek the spring's offerings. The Hailstones must work together to overcome a quickly flooding tundra.

'S1/E2 - Conflict'. As the Serengeti starts to dry out, competition hots up between the families of lions, cheetahs, baboons, elephants, ostriches and hyenas.

'S10/E10 - Thailand'. Ben meets Niall, who rescues and cares for street dogs in Koh Samui.

'S7/E17 - New Country'. Sue is out to hunt caribou. Ricko travels to a natural hot spring. Jessie moves to Brushkana. The Hailstones build a wall tent and go fishing.

'S5/E1 - London's Super Sewer'. In this episode, a multi billion pound 32 kilometre super sewer tunnelled underneath the feet of nine million Londoners.

'S1/E5 - Sicily Part 2'. Michael's Sicilian adventure sees him dine with a Duchess, journey off-road to discover a wonder of the classical world, and marvel at a golden cathedral with a hidden secret.

Changing Planet: Coral Special will embark on the third year of this 7-year project examining the issues facing the planet's most threatened ecosystems.

'Anton and Giovanni's Adventures in Sicily. S1/E1'. The first leg of Anton and Giovanni's Sicilian road trip begins in the port town of Sciacca. From there, it takes in Greek architecture, octopus fishing and a tango festival.

'S5/E2 - Bluewaters Island'. In this episode, a vast new island is appearing from the seas off Dubai to house the world's biggest observation wheel - twice the size of the London Eye.

'S5/E16 - Stratolaunch'. Stratolaunch, the world's biggest all-composite plane in terms of wingspan, is being developed by Stratolaunch Systems.

Two world-leading projects designed to tackle the crises facing Earth's rivers come under the spotlight.

'S7/E5 - Sweden'. Ben travels to Sweden to meet Annalisa, the Italian chose a life on the streets of Europe as a teenager, and now is developing a forest hideaway on the fringes of Swedish society for her and her toddler.

'S12/E16 - The Warming'. With spring in full effect across the Arctic, residents of Alaska must seize seasonal opportunities. Sue Aikens sets out to hunt small game but must be wary of her recent surgery.

'S5/E3 - Whistler'. In this episode, man versus snow - engineers battle the elements to build an incredible record breaking mountain town on the Canadian Pacific seaboard.

'Anton and Giovanni's Adventures in Sicily. S1/E1'. The first leg of Anton and Giovanni's Sicilian road trip begins in the port town of Sciacca. From there, it takes in Greek architecture, octopus fishing and a tango festival.