I owned the first three seasons of this EPIC series on dvd and had been disappointed by the double black bars (fullscreen letterbox) presentation of this series. A quick fix was to change your zoom settings on your set or player, but this fix was quite awful in what seems to be lower than a 480i resolution.
This product on Blu-ray is awesome, it contains all 12 episodes of season 4 plus additional never-aired segments presented on 3 Blu-ray discs.
(Disc 1) Death Stars, The Day the Moon was gone, It fell from Space, Biggest Blasts
(Disc 2) The Hunt for Ringed Planets, 10 Ways to Destroy The Earth, The Search for Cosmic Clusters, Space Wars
(Disc 3) Liquid Universe, Pulsars and Quasars, Science Fiction/Science Fact, Extreme Energy.
Bonus features include; Meteors: Fire in the Sky, Comets: Prophets of Doom.
The Blu-ray release of this series is truly wonderful in full 1920x1080 HD. This is a true widescreen release. The audio is presented in lossless 2.0 Dolby Stereo.
The graphics and special effects can be and most of the time are the best of any production I have ever seen. It stands alone in comparison to anything the BBC, NOVA, The Science Channel, or The Discovery Channel has ever created.
If you are interested in a mind blowing, educational, heavily entertaining piece of eye candy, then do not pass this product up.