This episode shows the verdant beauty of the wetlands surrounding the Caspian Sea.

Creatures of the USSR's remote mountains ranges, high deserts & inhospitable soda lakes.

The arid central deserts of the former USSR, & the animals that live in these harsh lands.

The Arctic tundra bursts into life in summer, a bounty of flowers, birds & grazing herds.

Siberia has temperatures of -70C and is home to Baikal, the world's oldest, deepest lake.

Russia's Far East is home to a plethora of fauna, from sea eagles to Siberian tigers.