Sound editing terrible

I know this is an old series but in some episodes it is sometimes impossible to hear what's going on. The sound editing is such a mess, there is at times the reenactment actors talking, then some random incidental music and also the narrator at the same time. Why do they need this stupid music? Why is it playing louder than the vocals? It's like trying to watch TV with the radio on. I used to watch Forensic Detectives when I lived in the Uk, and it was never like this. I've watched a lot of these New Detectives episodes and it's only been the last few that I have noticed with the idiotic sound mixing. It's such a shame as the program content is very interesting. Maybe I need to mute the sound and put subtitles on?!