I recommend "Source Code" for anyone who enjoys intelligent science fiction thrillers, not unlike last year's "Inception" (sorry, Michael Bay fans). It's science fiction without aliens. The most alien thing about the movie is that Hollywood managed to make a film that forces audiences to think instead of distracting/overwhelming them with special effects (sorry again, Michael Bay fans). It's from director Duncan Jones, who gave us the critically acclaimed "Moon" in 2009, and it may be an even better film.
Jake Gyllenhaal plays a soldier, Colter Stevens, who wakes up in the body of another man on a passenger train. His mission is to find out who blew up the train - yes, that's past tense - and, more importantly, is plotting an even bigger attack on the city of Chicago. The main cast members - Gyllenhall, Michelle Monaghan, Vera Farmiga and Jeffrey Wright - are superb in their roles. Gyllenhall, in particular, portrays Stevens with a dual intensity as he pursues his mission while trying to piece together his own past.