Sliding Doors is a rather smart and charming romantic comedy that’s a lot of fun. Playing with alternate realities, a woman’s life takes two divergent paths when in one reality she misses the subway and in another she makes it. Gwyneth Paltrow, John Hannah, and Jeanne Tripplehorn lead the cast and give strong performances; especially Paltrow, who pulls double duty playing two characters that are the same person yet slightly different. Additionally, the director does a good job at differentiating between the two realities, particularly when they cross paths at the same places with the same people. However the script is a little weak, with extraneous subplots that don’t really add much. Yet the humor delivers plenty of laughs and some clever satire (though at times it’s a bit slapsticky). Sliding Doors is not without its problems, but on the whole it’s an entertaining “what if” film about destiny.