I know it's not finished yet, and the final, uuh, UnAmerican episode is yet to be shown - but let's be having some of the best moments:
1. Epic bison versus she-wolf battle, with the overhead tracking shot of both exhausted animals lying down in the snow. Jack London couldn't have written a more powerful scene.
2. Shards(?) of ice floating up from the seafloor, carrying various trapped invertebrates - an extraordinary vision, among many.
3. Danish Special Forces dog team camped out beneath the aurora borealis - when I grow up, I want to be...
Outstanding series - they raised the bar, again. Gawd bless Sir DA.

