Liked "Winged Migration" and "Microcosmos," "Deep Blue" is a big-screen nature documentary patiently filmed over a period of years. As "Winged Migration" concentrated on the creatures of the air, so "Deep Blue" focuses on creatures of the sea. Reminding us how little we have explored the liquid space of our own oceans, the images here can be beautiful and graceful (dolphins playing in the surf), humorous (a mass of crabs laying eggs on the sand) as well as grim and deadly (killer whales attacking and eating seal pups). The moments of beauty are poignant indeed, and "Deep Blue" has it's share of "wow" moments. It divides itself into various themes; the shallows, the shoreline, the open seas, the polar seas, and the deep. The latter is shot near the deepest places on earth, and several creatures never before photographed are displayed in all their bioluminescent glory. The penguins shooting out of the ocean like biological missiles is quite amazing, and the feeding frenzy of the sharks is terrifying. Michael Gambon's narration is rarely intrusive, but it isn't as informative as I would have liked; they could have used some graphics to at least give you an idea of what creatures you were seeing, or where the shots were located. Still, this is a beautiful film, much of which was filmed for the "Blue Planet" BBC series. It looks frightfully gorgeous on the big screen, although parents should be warned that the seal pup death scenes can be terrifying to younger or more sensitive viewers.