Just finished the 4 seasons, what a masterpiece and so relevant to the movie imagining many lines for the charachters, I hate that this series didn't have the same reputation like many successful serieses. I mean look at the ending itself, the last episode is just like a whole movie.
I loved the music inside and the intro, outro of course, I even kept searching for that particular symphony related to Ethan as they were calling him the witness.
This is the link for it:
https://www.youtube.com/watch?v=adaTEdqR4xI&list=PLkLimRXN6NKxvEuzEtGQb8thDTcfJclAY&index=3