Definitely one of the best documentaries ever. The awesome video combined with superb audio effects make for an engaging viewing experience.

The series is airing in Canada/U.S. right now with Alec Baldwin as narrator. I think this is the first time airing on the Discovery Channel. Fortunately I have the original BBC version with David Attenborough doing the narration. I also prefer the "freeze frame" sequence structure in the BBC version which shows the "making of" clips at the end of each of the seasonal episodes.

The only real complaint I have is that the polar bear footage does not have a predator/prey sequence. I assume they did not come across anything in their travels. The lack of a pred/prey polar bear clip is made up for in what I think is one of the best predator sequences ever filmed. The filming of the battle between the wolf and Bison is absolutely stunning, not to mention heart wrenching. Additionally, the way they get in position for the shot is crazy.

My other favourite sequence is when the team filming the Adelie penguins gets trapped by the wind for 4 days. That would be pretty scary.

All in all a great viewing experience.