I'll regret this series, that joined superb acting, clever writing and nice cinematography.
Even when not completely realistic (as in this episode maybe), the characters' psychology was always finely studied, and eventually quite convincing. There were a lot of sinners in the series, and it took one of them to expose them all...
We left the main character up on a bluff, after a moment of self-analysis, and he may have found some level of inner peace... Unfortunately we'll never know what follows for him. One way of seeing this is to say that the series ended precisely because he found peace, that in a way the series was based on the fight with his inner demons and that it could not go on without this. So he saved himself and killed the series... oh well... Anyway, kudos to Bill Pullman for his great work here.