I absolutely adore The Outsider -- it's one of Tim Daly's best performances (he is a much underrated and underappreciated actor IMHO) and of course... Naomi Watts, but before she was NAOMI WATTS. (Her breakout movie, at least in the U.S., was Mulholland Drive, 2001.)
The Outsider was filmed in Australia, which makes an excellent stand-in for Montana. ;)
It's the classic tale of the bad man reformed by the good woman, though with a slight twist (no spoilers). Going no farther back than the history of cinema, William S. Hart was doing this story back in the silent era, yet it never seems to grow old. I guess there's something in the human psyche that loves to see souls redeemed and set free -- from all kinds of mental prisons.
The Outsider was adapted from a very popular historical romance novel by Penelope Williams. As romance novels go, it's actually pretty good. There is some lovely descriptive language of the mountainous landscape. On the other hand, being a romance novel, when it comes to the romance bits, the descriptive language turns all purple and florid. ;) What I really liked about this dramatization was that the camera gave us that beautiful mountain setting, and while also showing us the touching romantic scenes, blessedly relieved us of the "swollen loins" style wordage in the book.