Parts Per Billion follows the intertwined stories of three couples at different stages in their lives who are dealing with their relationships during a time of global crisis. Each couple is dealing with their own issues within the context of larger events. Those seeking scenes of mass hysteria and destruction will be disappointed. This is a relationship movie, through and through.
It's no surprise that the cast is terrific, and do the best with what they have to work with. Whatever faults may exist, the writers and cast create believable and interesting characters. The non-linear nature of the story -- the scenes jump from couple to couple and from time to time -- can be a tad confusing at times, but it was probably necessary to provide a feeling that something is happening. This is important, because nothing actually is happening. To use a cliché, it's like the characters are rearranging the deck chairs on the Titanic without even acknowledging that its sinking. There is an unreal feel to how the looming external crisis is ignored by pretty much everyone until it is on top of them. For this reason, the film wastes the whole concept of impending doom and leaves us dealing with normal couples dealing with normal issues.
Perhaps it was the director's intent to show how we get so swept up in our own personal affairs that we can't see the big picture, but it just seems to me to be a waste of a good premise. I can't help but compare Parts Per Billion to Another Earth. Both are small-budget films that deal with tragic relationships in the shadow of bigger events, but the later film was able to tie the two things together. This, too, could have been a poignant film, but it comes up short.
