One of the ways it does this is to use tools taken from other genres. I wrote before about how it used eroticism as a tool, using romantic language and scenes transposed onto the three-way relationship between the main characters. But there are loads of other examples.
A small example from this week: character falls to the ground. Oranges drop onto him. This is a reference to The Godfather trilogy, in which oranges are a symbol of death. But it also works if you don't know the Godfather. The oranges fall, bounce. He's dead. And in fact, the scene is also quite like a scene from Fargo too, and the contrast in feel between the two types of gangster film is also significant. This type of direction maximises the carrying capacity of each frame. The use of orange is also an example of the way colour is employed very deliberately - and I think this season more than ever - like a sound track.
There are also cross-references within the series - what a swimming pool means, what cleaning the equipment means, what hair means. Because of the intricacy of the whole, there is a backlog of significance to draw on.
In short, there's always extra content being conveyed by making maximum use of details which in other shows would be left to chance. Everything is layered, meaning other things. I often have to stop the playback and get up and walk around. It takes me about an hour and a half to watch 45 minutes.
This season they are increasingly taking symbols and tricks from the horror genre. The end of the most recent episode 'Crawl Space' was - if I say chilling it doesn't really convey. It was like David Lynch or The Shining. Crawl. Space. It's like HP Lovecraft. And there was nothing supernatural - there never has been anything unreal or uncanny. And yet it is all now uncanny, as if the characters this season have passed out of the normal world.
I can remember an example of this from The Wire - the Chief of Police drives around Hamsterdam, to see what he has wrought. Although in some ways the logic of The Wire supports what he has created, this scene is like a horror film. It's like hell actually. When Jesse had his breakdown earlier in the season his house became like Hamsterdam.
The end of this episode. If I describe it, you won't be any the wiser. Skyler walking up the corridor, and the sound of Marie talking on the answering machine in the kitchen, and Walt laughing in the background. That tells you nothing. The atmosphere for that little scene was - it was ghastly. It was pure horror.