And whilst it's not a film 'The Night of' with the very underrated John Turturro is an incredible piece of television.
Riz Ahmed's character transformation through the film is very well executed. Definetly in my top 5 HBO productions.
One of my favourite old british films is The Boys staring Dudley Sutton (Tinker from Lovejoy)
It's based around a group of Teddy boys in London in the early 60's, the story is told from the courtroom as part of their cross examination.