You'd be better off reading "The Lathe of Heaven"

Rating: Null/10 (19 February 2004)

The film was well done on the whole, and the acting was good although some of the plot elements were improbable. As a science fiction buff, I left the movie somewhat unsatisfied, thinking "I've seen this plot before." The plot appears to be the major feature of the movie, but the plot as it stands alone, fails. I was unsatisfied that other more subtle ethical and sociological themes weren't better drawn out.
From the trailers alone, science fiction buffs will easily recognize the plot as a variant of an oft-used time travel theme. To experience the definitive use of this theme, I suggest the reader obtain a copy of "The Lathe of Heaven" by Ursula K. LeGuin, which uses the plot (correctly) merely as an element to draw the reader into serious ethical and social questions.