In reply to mypyrex:
You could try messing with the equaliser settings on the tv and or the speaker, they usually at least have a crude 3-way eq adjustment with treble and bass sliders or some preset modes. Doubt it'll make much difference but then I don't have hearing aids... worth a shot. In general though, the problem you've identified with tv drama using soundtracks muddied with background noise and music is not one technology at the point of delivery can do much about. Failing that, turn it up, subtitles or maybe try an induction loop if your hearing aids support it.
jk