I seem to have gotten the same dvd twice.
My series 2 disks 1 and 2 both have their correct cover art but disk 2 is obviously a misprint as it contains episodes 1-4 again instead of episodes 4-8.
I'm going to try and contact the manufacturers for a replacement disk rather than go through the hassle of returning my whole box set (anyway I don't want to have to stop watching all the rest of the episodes!).
Has anyone else had this problem?