Sometimes when FH raises his voice you can hear a hint of his accent, but it's really only noticeable if you know that he's British.
This season finale was pretty good, but overall this season was a bit lackluster due to the amount of drug sideplot. They really messed up by putting so much of that in this season when there are only 10 episodes. I did like that there was finally a bit of closure on the Miss Watson murder. The viewers now know that Norman killed her, but he had a vision of Norma saying she killed her so he can successfully pass the polygraph test. Where did Caleb go? Did he leave town after the encounter with Norman?