It may not be your hearing.
I have trouble with Brit TV audio, whether on TV or disk. I beleieve there's some incompatibility issues about UK audio recording gear and our playback capability. Even when I pipe the audio through our Bose amp, I have problems with the bass notes on the music, and the conversation sounds muffled.
Anyway, I'm happy at least one of you guys saw this. It really is remarkable drama. The Brits seem to be so good at it.