BBC Earth HD

'S1/E3'. David tracks Agatha's 1922 'empire tour' to New Zealand, where he explores woollen mills, gold mines and geothermal hot springs. He also learns why Poirot dislikes the sea.

'Agatha Christie: Lucy Worsley On The Mystery Queen. S1/E2 - Destination Unknown'. Lucy Worsley uncovers the origins of Agatha Christie's macabre magic and, with some compelling characters, reveals carefully concealed secrets.

'S11/E8 - The Rising Tides'. The Alaskans push through the deep cold to increase their odds of survival.

'S5/E6'. In Germany, floods tear through central European towns and villages. In Nepal a landslide threatens local communities. In California, wildfires tear through the states forests and farms.

'S1/E3'. David tracks Agatha's 1922 'empire tour' to New Zealand, where he explores woollen mills, gold mines and geothermal hot springs. He also learns why Poirot dislikes the sea.

'S1/E10'. Some owls are causing trouble at a mechanics' training centre, others are in a woman's roof and, in a slight change from their usual clients, the Murrays are called to help rescue a baby giraffe.

'S2/E5'. Paul and Bob fly to Enniskillen to fish for the pike which eluded them in series one. Paul demonstrates how to perform life-saving CPR and Bob tells Paul's fortune in a traditional Irish manner.

'S11/E1 - Pulled from the Darkness'. As Alaskans enter a new dawn in the Arctic winter, they must adapt to the changing landscape if they are to survive.

'S11/E2 - Like Ghosts'. The Hailstones produce an original work of Inupiaq art, and Cole Sturgis ventures into the wilds of the Southeast on a life-or-death hunt.

'S5/E5 - NATO's AWACS'. In this episode, the eyes in the sky, the distinctive aircraft with a huge radar dome mounted on its roof - NATO's incredible Airborne Warning And Control System.

'S1/E3'. David tracks Agatha's 1922 'empire tour' to New Zealand, where he explores woollen mills, gold mines and geothermal hot springs. He also learns why Poirot dislikes the sea.

'S1/E4 - Misfortune'. The long-awaited arrival of the great migration increases conflict between the families of the Serengeti.

'S1/E5 - Exodus'. The dry season is now upon the animals of the Serengeti, and while the increasing drought turns the waterhole into a death trap for some, Kali and her cubs are finally able to enjoy life back in the heart of the pride.

'S1/E6 - Rebirth'. It's the end of an extraordinary year for the animals of the Serengeti. In the aftermath of a huge fire, which families made it through alive?

'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.

'Anton and Giovanni's Adventures in Sicily. S1/E2'. The second leg of Anton and Giovanni's trip takes them to Mount Etna, Europe's most active volcano, where they are joined by 2021 Strictly champion Rose Ayling-Ellis.

'Anton and Giovanni's Adventures in Sicily. S1/E3'. For the final part of their trip around Sicily, Anton and Giovanni make their way to Gio's hometown of Palermo, stopping along the way to meet some beer-brewing monks.

'S1/E1 - Episode 1: Venice'. In Venice, Rob and Rylan discover one of the largest works of art in the world, Rob attempts to conduct an orchestra, and Rylan explores the city's hidden side.

'S10/E12 - Sri Lanka'. Ben stays with Naveen and Anke who have made their home in the Sri Lanka's highlands. He uncovers why they swapped one of the biggest cities in the world for a simple off-grid existence miles from civilisation.

'S11/E1 - Norway'. Ben heads to an island at the edge of the world on Norway's arctic coastline, and meets Elena, a former Middle East peacekeeper who has created her dream home here.

'S11/E2 - Portugal'. Ben Fogle journeys to the mountains of central Portugal.

'S11/E9 - The Silent Hunter'. Alaskans stand their ground as winter brings one final barrage.

'World's Most Amazing Walks With Robson Green. S1/E4 - Normandy'. Robson Green walks in the footsteps of the brave soldiers of the D-Day landings in Normandy, France, on an emotional journey of sacrifice and courage.

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

'Agatha Christie: Lucy Worsley On The Mystery Queen. S1/E3 - Unfinished Portrait'. Lucy Worsley uncovers the origins of Agatha Christie's macabre magic and, with some compelling characters, reveals carefully concealed secrets.

'S10/E12 - Sri Lanka'. Ben stays with Naveen and Anke who have made their home in the Sri Lanka's highlands. He uncovers why they swapped one of the biggest cities in the world for a simple off-grid existence miles from civilisation.

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