In Source Code, it is shown that by redialing a number from the same phone that was connected to the bomb, Capt. found the guy finally who set up the bomb.

But is it realistic for a terrorist to leave any loose (major actually) end like this in such planning?

This gives birth to two questions. What was the necessity for the terrorist to call the number? And if it was called for checking the connection purpose, should not the terrorist have deleted it?

I think it is a major plot-hole in the movie and catching of the terrorist should have been done in another way.

  • 2
    Why should he care about the mobile phone that will explode anyway? AFAIU he couldn't know that someone will send agent to the past to check the bomb. Nov 26 '12 at 7:36
  • That is the loose end thinking I am talking about. No expert in crime would do a perfect work with this type of silly mistake. I guess deleting a number from the call list is not that hard. So why let it stay in the list?
    – Mistu4u
    Nov 26 '12 at 7:39
  • 1
    Maybe it's some kind of several-step activation. Anyone, terrorist actually succeeded in first n realities presented in the movie. So it was reasonable to not expect somebody to find a phone before an explosion. Nov 26 '12 at 7:50
  • Do not confuse it with parallel realities. The terrorist is not aware of the realities. Tell me why did he not delete in the current reality where rutledge and goodwin lives? He should have deleted it in the first place practically!
    – Mistu4u
    Nov 26 '12 at 8:02
  • 1
    "Is it realistic for a terrorist...?" and "Why didn't the terrorist in the movie...?" are different questions.
    – Oliver_C
    Nov 26 '12 at 9:53

Like default locale says, the phone would explode along with the bomb; So nobody would ever get to see it/recall the last number. Removing the last number should only be done if the bomber fears to be discovered. As the bomber has successfully bombed before and nobody on the train (without time travel capacities) can even begin to expect something, he doesn't expect someone to find his bomb.

You have to place yourself in the bomber's place. If you assume the bomb to fail, then you could just as well abort the mission. There's also a million other more important things to worry about (getting the components, building the bomb, smuggling it on the train, installing it, other bombings,...). Why not use a better/more reliable stand alone system (other than GSM) to trigger the bomb. Nobody would be able to trace that. Why not use a more basic phone with no memory at all? Why did he call the phone in the first place?

Just one of the many design choices you have to make while building a bomb and it doesn't seem too important compared to major issues (I would worry about hiding my explosives).

EDIT : Just thought of another explanation. If you want the bomb to explode only when receiving a call from a specific number, then you have to store that number in the cell phone. If you don't, it might blow when a telemarketer calls for an advanced subscription plan.

  • That is my point. If he has done so many things successfully, why leaving the call list undeleted? Anyway, let us see what community thinks on it...
    – Mistu4u
    Nov 26 '12 at 9:03
  • @Mistu4u Just thought of another explanation
    – Origin
    Nov 26 '12 at 9:11
  • This one sounds more logical.
    – Mistu4u
    Nov 26 '12 at 9:14
  • yeah, wonder why I didn't see it sooner :p Then again, it's also a design choice (so my entire explanation isn't useless): Do you go for the cell phone with tracking or do you go for special detonators, which leads you to the grand set of other, more important decisions...
    – Origin
    Nov 26 '12 at 9:17
  • Really a very good explanation. +1 to you.
    – Mistu4u
    Dec 27 '12 at 15:18

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