I absolutely hate “Scherzo”. I hate most of S8. Not as much as S7, but I do hate it. In any case, though, as with S7, there are wonderful moments. This is one of the highlights for me.
Since I’ve only been part of this cult community for a short time, I’m sure someone has discussed this before now, but towards the beginning of the episode, Morse is getting dressed. We haven’t seen him appear yet and we’re a few minutes in. 
As the scene opens, we hear Wagner‘s famous “Tristan Chord”.
Part of the reason why it’s famous is because of its construction. It’s unresolved. Unresolved chords create tension and uncertainty. They’re also quite dramatic.
This happens several times in the opera “Tristan und Isolde“, and at this moment, at the beginning of Act 3 (the thing is four hours long), our hero, Tristan, is injured and hoping for help.
As the camera pulls back from the image of the turntable, we see empty bottles - it’s first thing in the morning we realize, because Morse is carrying coffee and putting on his tie. That’s lot of bottles. He’s clearly not okay. There’s a knock at the door.
Instead of help for our hero, it’s Gwen. 
I know it’s not a Thursday Thursday, but I thought I’d leave you with a Tristan Thursday before I head off to a busy workday. 
Volume up.