Each spring, massive sweet water thawing rapidly transforms the polar regions and the surrounding seas, where broken-off ice floats to. This is crucial in the life cycle of many species, sometimes extremely elaborate. Many colonies (re)unite to mate, hatch and/or start raising offspring, especially in 'temperate' parts, such as South Georgia island.
Stars: David Attenborough, Alec Baldwin, Mark Smith
Director(s): Mark Linfield
Writer(s): Paul Spillenger