BBC Earth HD

'S1/E1 - The Arena of Death'. Join Dan Snow as he uncovers the incredible story behind the Colosseum's creation: separating fact from fiction, discover the real story from Roman concrete to gladiators, and the spectacular opening games.

'S10/E8 - Columbia'. Adventurer Ben Fogle meets Vanessa Forero deep in the Sierra Nevada de Santa Marta, an isolated mountain range in the north of Columbia.

'S11/E16 - Summer Camp'. The warm season provides for Alaskans.

'S3/E8 - Heroes'. David Attenborough introduces conservation heroes fighting to save the world's wildlife, from exploring remote jungles to going undercover to catch criminals in the illegal ivory trade.

'S2/E7 - Our Blue Planet'. David Attenborough explores the issues behind the series' most spectacular stories and examines the future of the planet.

'S2/E6 - Our Frozen Planet'. Frozen Planet returns with a spellbinding journey through magical icy lands.

'S5/E2 - California'. Pulled by a gleaming Siemens Charger locomotive, our double-decked coaches will take us on a 350-mile trip into the Californian dream. On our way we'll stop off in Carlsbad.

'S1/E6 - Miami Sinking, Part 2'. The coastal metropolis of Miami faces a triple threat of crumbling limestone bedrock, ferocious superstorms and relentless rising oceans.

'S10/E8 - Columbia'. Adventurer Ben Fogle meets Vanessa Forero deep in the Sierra Nevada de Santa Marta, an isolated mountain range in the north of Columbia.

'S1/E18 - Stockholm Part 3'. On his final day in Stockholm, Michael investigates the sinking of a mighty warship.

'S5/E3 - Peak District'. Travelling through the Peak District at full steam, pulled by the Royal Scot - one of the finest locomotives ever built.

'S10/E9 - Ireland'. On Great Blasket Island, off the coast of Ireland, Ben stays with London couple Dan and Emily, who landed an extraordinary job as island caretakers on Europe's rugged western frontier.

'S11/E20 - One Last Chance'. As the sun fades across the land, Alaskans brace for Dark Winter's return.

'S10/E9 - Ireland'. On Great Blasket Island, off the coast of Ireland, Ben stays with London couple Dan and Emily, who landed an extraordinary job as island caretakers on Europe's rugged western frontier.

'S11/E17 - Run Aground'. Alaskans are in the home stretch of preparing for the upcoming winter.

'S5/E4 - Portugal'. From a vineyard that has been making one of Britain's favourite tipples - Port - travel down the line that once transported it to the city that gave it its name: Porto.

'S1/E18 - Stockholm Part 3'. On his final day in Stockholm, Michael investigates the sinking of a mighty warship.