Captain Stevens: Goodwin, you out there?
Dr. Rutledge: Goodwin, who is Goodwin.
Captain Stevens: This is Captain Stevens, do you copy?
Dr. Rutledge: Captain Stevens?
Captain Stevens: The capsule lost power.
Dr. Rutledge: The capsule? Is that where you are now, Captain, in a capsule?
Captain Stevens: You should know, who are you?
Dr. Rutledge: Let me get Captain Goodwin, get to it!
Captain Stevens: You invented this thing, right?
Dr. Rutledge: I did.
Captain Stevens: Are you in command here?
Dr. Rutledge: I am. Were you able to locate the information we need, Captain?
Captain Stevens: That's a negative Sir. I was unable to find the bomber, but I did save her. A passenger on the train. I got her off safely, a woman.
Goodwin: Captain, it's gonna be counterproductive for you to try to save anyone on that train. They're outside the mission.
Captain Stevens: Well, but she survived. And maybe the rest could too.
Dr. Rutledge: She survived, but only inside the Source Code. None of them will be safe.
Captain Stevens: What is this Source Code?
Dr. Rutledge: It's quantum mechanics parable calculus. It's very complicated.
Captain Stevens: Try me!
Dr. Rutledge: Fine. When a light bulb's turned off, there is an afterglow, a lingering halo-like effect. You seen it?
Captain Stevens: Yes.
Dr. Rutledge: Of course. The brain is like that, its electromagnetic field remains charged, just briefly even after death. Circuits remain open. Now there is another peculiarity about the brain. It contains a short-term memory track that's approximately 8 minutes long like a convenience store's security camera that only records the last portion of the day's activity on its hard drive. Now combining these two phenomena, circuitry that remains viable postmortem and a memory bank that goes back 8 Minutes Source Code enables us to capitalize on the overlap. Shawn Fentress died on that train, of all the passengers aboard he was your best link. You two share the compatibility in terms of gender, body size and your synaptic maps.
Captain Stevens: What happens after the 8 minutes?
Dr. Rutledge: After? Nothing. You cease to exist on the train. You cannot exist inside the Source Code, beyond Fentress' 8 minutes. Source Code is not time travel. Rather, Source Code is time reassignment. It gives us access to a parallel reality. Now the deaths on the train were a tragedy but Source Code empowers us...
Captain Stevens: No, but I saved...one person, that girl, that's always sitting across from me. I pulled her off the train.
Goodwin: Give me her name.
Captain Stevens: Christina, I don't remember her last name.
Goodwin: Her name was Christina Warren.
Captain Stevens: Yes!
Goodwin: She was 28.
Captain Stevens: That's her!
Goodwin: ...born in Moline, Illinois. Died this morning on the train.
Captain Stevens: No, no, I pulled her off. She's fine.
Dr. Rutledge: No, she isn't.
Captain Stevens: Believe me, she is.
Dr. Rutledge: Believe me.
Captain Stevens: She saw me get hit by the express train.
Goodwin: This isn't us getting anywhere.
Captain Stevens: No, no, no, wait, wait....
Goodwin: We have to send him in. A second attack is imminent, Dr. Rutledge.
Captain Stevens: What second attack?
Dr. Rutledge: The train was just the beginning. A letter of intent.
Captain Stevens: I am sorry, what are you telling me here?
Goodwin: We have information that Downtown Chicago is the next target. And they're planning to detonate a dirty bomb.
Dr. Rutledge: You have any idea how many people would die if an explosion of that magnitude were to occur in the city? We're evacuating as we speak. We've to stop it before it happens, do you understand?
Goodwin: If you find the bomber, his second attack, the real attack, we think, can be prevented. We have very little time left. Out here the clocks only move in one direction.
Dr. Rutledge: Charge the drivers.
Goodwin: On the upper deck of the next carriage there is a conductor's compartment. It's a small office containing a strongbox. Inside is a loaded handgun. Get to it. You are authorized to use whatever force necessary.
(Captain Stevens is sending back to the eight minutes)
Christina: I took your advice...It was very good advice...