For those people (like me) who didn't realise this is half a season I have found out the following:
This is the first 10 episodes.
The last 10 episodes will be released in the UK under the title of 'Season 5' (hence the 'Season 4' title of this one).
This UK release will also include 'Razor' (although I can't find any confirmation of whether it will be the extended version of 'Razor'). It will also included deleted scenes and a sneak peak of the 2nd half of the season.
If, like me, you haven't bought Razor yet then this is still a good way of getting your BSG fix. Especially as I'm getting this as a birthday present.
Having now received this item:
This set contains:
The first 10 episodes of Season Four.
The EXTENDED VERSION of Razor (including commentary, deleted scenes and minisodes).
A sneak peek trailer of Season 5 (really 4.1) (which is not worth the disc space)
A whole bunch of deleted scenes from each episode.
Unlike others I was unable to buy Razor earlier - so the inclusion of the extended edition here is absolutely brilliant.
I also did NOT want to wait another year simply so have this season in a single box.
I'd rather watch these excellent 10 episodes NOW and wait for the final 10 until next year.