'EE' is for 'Extended Edition'. It's the special long versions of the movies Peter Jackson (the director) have send out on DVD. Apart from quite a bit of extra footage (30-40 minutes extra on the two first EE's) there's also an improved surround sound (DTS 6.1) and 4 different tracks of commentaries (from director(s), actors and other involved) one can play with the the normal moviesound off. In the case of the two first movies, this have made it necessary to have the movies on two DVD's, instead of the theatrical versions one. Plus, there's two DVD's with extra material in the EE-editions, too. It all adds up to about 25 hours of material to look at from the 4 DVD Extended Editions.The EE-version of "Return..." is believed to have about an hour extra on the movie itself (Probably making it necessary to have this on 3 DVD's). In many ways, these versions are for the enthusiasts - though many maintain that the more calm pace of the EE versions in many ways makes both the story and the characters work better. But the price is that they ARE very long. As far as I can estimate, when the last of the EE-editions comes out, the 3 EE's put together will last for more than 11 hours - one will be able to spend a whole day watching Lord of the Rings :-)