For starters, poor Dario is vividly having a psychological problem which I would say resulted from his childhood trauma , so why did he ended up being the bad guy? I really wished him with Alma . And perhaps some professional help.
Secondly, they kinda left some loose ends . Who killed that 5 year old exactly? How was Dario in two places at the same time frame?
That aside, it was indeed thrilling to watch. The suspense and secrets were top notch.