Lithgow can play anything.....He is the most versatile actor working today. How he goes from "Third Rock from the Sun" to the serial killer in the "Dexter" mini-series to this astounds me. His conviction and believability in this role is amazing.
Alfred Molina also surprised me. I never saw him playing this type of role. I found him attractive and compelling.
The end of the movie was somewhat strange and anticlimactic for me. I wanted them both to be happy, and live a while longer. But alas, relationships end sometimes because we physically give out. When we're done....we're done. End of story.