I also saw it only the one time when it was broadcast and have remembered ever since, especially whenever I hear Buffy St. Marie sing "Until It's Time For You To Go".
The Reynolds and Stevens characters each have strong principles, that initially bring them into conflict, then eventually allow them to learn from each other. In fact, I think it is strength of character that pervades the film, and makes it so memorable.
It would be great to find that someone has a print available. I'd like to get a more detailed understanding of the Reynolds character. It's hard to analyze at this distance, since on first viewing I was watching for story and performances. Does Simon qualify as a tragic hero - that is, does a flaw in his character bring him to his fate?
Stevens has one of my all-time favorite final lines - and as I recall, it's not even spoken, just an action.