On the region 1 version, which is the same in the way of extras and packaging and all other areas, there is the ability to choose the original English mono sound track or the English Dolby 5.1 track. Not so on the region 2/PAL set...it is the Dolby 5.1 only. This is annoying, as I usually go back to the original track with older stuff that has had a surround track remastered from the original mono source. Reason being, no matter how hard they try....these remastered 'surround' tracks never truly work well. They are always front heavy, low on spatial sounds and often sound echoey and....well, false. I see no reason why Paramount UK chose to rob us of the alternate/original English mono track.