I enjoyed watching Fireproof. The idea behind it is great, but we are dealing with so many other aspects when it is MLC. If a simple movie, book, article, or phrase could repair it, we would have come up with it by now. There isn't much we can do until they complete their journey.
The things like marriage counseling, relationship books, couples' retreats, movies, testimonials, etc. that might help a marriage with some normal issues get back on track are often the things that push our MLC'ers away and give them more justification as to why the marriage is over.