Recipe for a sci-fi thriller: take a sprig of Memento, a dash of Groundhog Day, and a pinch of Inception. Mix them together and you’ve got Source Code, which critics say is a smart, suspenseful popcorn flick with excellent performances. Director Duncan Jones’s follow-up to the bleak, haunting Moon, Source Code stars Jake Gyllenhaal as a soldier on a mission: to save a Chicago commuter train from a bomber. One issue: he’s part of a government experiment called the Source Code, in which he can transmogrify into the bodies of others for the last eight minutes of their lives, thereby finding clues as to the identity of the bomber. But can our hero save the day? And who is our hero, anyway? The pundits say the Certified Fresh Source Code is multiplex fare of a very high order: it’s challenging, emotionally engaging, and brutally exciting.