Choosing PLANET EARTH for DVD/HD/Blu-Ray--BBC

*EDIT* Please note that North American buyers have 2 domestic options: Discovery and BBC editions. HOWEVER, the NA BBC version does not feature the bonus content disc that gees with the UK BBC Blu-Ray version. The NA BBC Blu-Ray version was released after I did my initial reviews. If you are considering the purchase of the BBC Blu-Ray edition, I regemend that you purchase directly from Amazon.uk--it is often cheaper than the BBC BR NA edition, AND it has the bonus content.Introduction