I purchased Planet Earth on Blu-Ray and it was delivered yesterday. As such, I watched a couple episodes last night. The show is a nature documentary produced by BBC and filmed almost entirely in High Definition. Over 2000 days of filming went into the final production and much of the footage is of events and animals that have never been captured on film. There is quite a bit of very impressive time-lapse photography as well.
After watching, I was in complete awe and appreciation of God's creation and ingenuity. I highly recommend the series.