"Jake Gyllenhaal headlines this sci-fi time-travel thriller directed by Moon's Duncan Jones from a script by Ben Ripley. A bomb explodes on a Chicago train, derailing the locomotive and killing hundreds. In an attempt to identify the bomber and prevent another, larger attack on downtown Chicago, Captain Colter Stevens (Gyllenhaal) agrees to take part in a clandestine government experiment dubbed "Source Code," which allows him to enter the body of...