to elaborate on what i said above, the most special thing about that show to me is how it forces you to identify with its terminally ill everyman and his initially rather goofy end-of-life crisis, and then very gradually this person you're rooting for turns in one of the most terrifying onscreen bogeymen in recent history. it sets you up for traditional genre pleasures and then it slowly, masterfully complicates them to the point where i started to feel very uncomfortable and exposed in a way i'd never felt watching anything before. it has to be seen until the end (or near the end, like pompey i was disappointed with the finale) to really experience the way its relationship with the viewer develops and destabilises, which is why people who gave up on it early have no business judging it IMO.