Our winter may be mild but the cold breeze off Lincoln Center last week for the premiere of Frozen Planet was distinct, in the teeth-chattering presence of cool sculptures of an ice waterfall and ice penguins. And inside Alice Tully Hall, the temperature was brisk too. The Discovery Channel’s documentary series Frozen Planet, “The Ends of the Earth” to air on March 18, proves that good storytelling features sex and violence, even if it is family entertainment. As Alec Baldwin narrates, giant polar bears can sniff the scent of a female seven miles away, and stepping through the snow in her footsteps, they stalk her, often mounting her bloodied, having successfully fought off a contender.