One piece of writing advice is to destroy your tv.
You’re a writer of books, so read ’em and write ’em.
TV was invented to distract you and allow advertising to sell you stuff.
So that should be enough for why not to TV.
So Why to TV?
Plot and Characters in a story arc.
Most tv series don’t give you much more, other than a great source of material for building ‘cliffhangers’ into your chapter endings.
Watch how each episode is finished. How does it wrap the events of that episode but how does it inform on what went on in previous episode plots or signal something yet to come.
What character relationships are there and how do they develop?
Not everything needs to make sense. A lot of TV shows don’t even try to explain shifts in scenes or seemingly impossible plot points – they just know you want a conclusion to that episodes situation and to see how the relationships between the key characters is furthered.
Perhaps you don’t need to fret over all of those details which were giving you sleepless nights after all.