Spoiler alert!
Do not read YouTube comments of this video or Teo’s if you are planning on watching ST4.
Epic choice for a song. The actor actually played the first riffs until it is swapped for the original. Finally they added a metalhead to the show. Great character.
Just finished it a few days ago as well 
It seems he is actually playing guitar:
Best character of season 4 hands down. Extra points for the riffs!
Was epic indeed! Just finished it as well, great choice of music!
Yeh, great series, .just finished it a few days ago
Yeah I watched literally the day it came out. Nice to see some great metal in the show. Master of Puppets was such a great song, and was off of the first album that turned me onto Metallica. Probably one of their best. I then had to go back and start listening to their first two albums. I had never heard a band before that played songs like that. Amazing.