"Michelle Monaghan gave another solid performance. Unlike anything she has done before, she uses the vulnerability of the character through the innocence of her not knowing the situation, that Christina Warren becomes charming and enticing.
Michelle Monaghan and Jake Gyllenhaal in Film TV (Italy) magazineThe romance in the film is a lot more complicated than in other films. They're falling for each other but can't see each other any further, because he is not in his true body and persona.
You see the source code works by having someone link to a recently deceased person's brain. A certain area of the brain can reveal and put you into his or hers life to relive the last eight minutes of their life. Which in the case of this film, can lead to a murderer or bomber in the end. So Captain Stevens is asked to go into the last eight minutes of a certain man's last dying breaths, to hopefully identify the bomb and even the bomber and prevent a future attack. 
The continuation of the story is superbly crafted. It seems as if every time he goes back into the deceased man's mind each layer of mystery and questions gets lifted uncovering more and more uncertainties on both sides of Captain Stevens mind leading to a conclusion that no one ever expects". Source: www.luminomagazine.com
"The highlight of the film is Gyllenhaal’s performance. He brings a human side to all the proceedings, and gives the character a level of emotional depth not seen in most action movies. Although the film only runs about 90 minutes, the audience truly gets to know the inner workings of Captain Stevens. His specific problems and emotions are seamlessly integrated into the film without taking away from the thrilling tone.
I must say after some of his films, such as Prince of Persia: The Sands of Time, I doubted Gyllenhaal’s abilities as a leading man. But his tender representation of a man who is given enormous responsibility proved he can act, and I believe he will be an actor to keep a close eye on in the future.
Source Code also works as a smart thriller. The action is never-ending and the overall plot oozes with tension. Gyllenhaal’s character repeatedly is thrown into situations in which he is racing against the clock, and each time he discovers something new about his surroundings. The short running time of the film, coupled with the fast pace, results in a complete lack of dull moments. For all you Shyamalan fans, there are a couple twists thrown into the mix that certainly caught me off guard. 
Throw in a couple of good supporting performances from Vera Farmiga and Jeffrey Wright, and you’ve got yourself a top-notch thriller". Source: www.cavalierdaily.com
