Here are a few things I could decipher on first viewing:
The Tom Hanks characters show that karma causes one to have to correct ones evil motivations: first he was a murderer and later he had to suffer so much loss of over ones and learn to give him self to save the lives of others.
The clone and lover story shows that every small deed has a large effect, therefore we should try to make a difference because everything makes a difference.
In storyline I figure that oil company’s sabatoging alternative energy in the 70s caused the seed of the crisis that occurred in the future, requiring humanity to get off planet earth.
All in all it was worth watching and I’d like to watch it a few more times.