Sunday December 9, 2012 update: These are the filenames for BBC Four episodes 7 and 8:
Search engines are your friend.
Saturday December 8, 2012 update: According to Comments, episode 10 subtitles in English are now available at Addic7ed.
I haven’t tried them, but I did peek at them as text files. Some minor differences, mainly with line lengths.
I will be un-Sticking this post by Tuesday. BBC Four airs the final two episodes on the 15th. This post will be updated before then, when the filenames for episodes 7 and 8 (which aired today) are available. I’ll do a new separate post with the filenames for episodes 9 and 10.