Land of Extremes is our introduction to the Arctic and many of the themes and ideas we explore throughout the series. This episode visually illustrates how the Arctic, locked in darkness for nearly seven months, springs to life once the sun rises above the horizon. We explore ideas of migration, hibernation, the food web, habitat change, and are introduced to some of the Arctic's most magnifi cent and iconic creatures and its most dramatic landscapes.

pt. 1. The Arctic Seasons: Land of Extremes: Arctic Secrets Series -- pt. 2. Polar Bears of the Arctic: Land of Extremes: Arctic Secrets Series -- pt. 3. Seals of the Arctic: Land of Extremes: Arctic Secrets Series -- pt. 4. The Migration of the Caribou: Land of Extremes: Arctic Secrets Series -- pt. 5. Bird Migration in the Arctic: Land of Extremes: Arctic Secrets Series -- pt. 6. Whales of the Arctic: Land of Extremes: Arctic Secrets Series -- pt. 7. Changing Sea Ice in the Arctic: Land of Extremes: Arctic Secrets Series -- pt. 8. Muskoxen: Adaptation to the Arctic: Land of Extremes: Arctic Secrets Series -- pt. 9. Grizzly Bears of the Arctic: Land of Extremes: Arctic Secrets Series -- pt. 10. The Mosquito: Ruler of the Arctic Summer: Land of Extremes: Arctic Secrets Series -- pt. 11. Lichen: Threatened by Climate Change: Land of Extremes: Arctic Secrets Series -- pt. 12. Fall Comes Early in the Arctic: Land of Extremes: Arctic Secrets Series -- pt. 13. Caribou: In a Rut: Land of Extremes: Arctic Secrets Series -- pt. 14. Wintering in the Arctic: Impact of Climate Change: Land of Extremes: Arctic Secrets Series.