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[picture from radiovisie.eu]
Broadly speaking, the theme of Source Code movie story with Deja Vu is not much different. Both are telling the story of how to unveil bombers through tools such as time travelers. What distinguishes may be only one, whose character is told by a soldier who died in duty but "resurrected" his brain while the one whose character is still alive.
Ah, so imagine if the tools used in the two films are true in the real world, perhaps murder cases can be quickly revealed without having to go through a long trial path.
In addition to Star Wars, Back To The Future, Quantum Leap (the TV series of the 80s), Terminator (except Terminator 4) and the two films above, there is another science fiction movie that impressed me so much now that Time Machine 2002). The story is simple about a scientist who wants to revive his lover who was killed by a robber in a park when he was about to apply. The trick with the scientist's time machine. But what happened later was beyond expectations. In addition, this film also makes us reflect on the meaning of receiving a bitter reality.
Time tools or time machines in the films above can be useful when in the hands of the right people and good. But it would be very dangerous to fall into the hands of bad people because it will be used for bad purposes. The time machine in the hands of bad guys will be the most dangerous genocide tool out of nerve gas, cluster bombs or atomic bombs. The culprit will no longer feel as God but the role of God.
Therefore, I really hope the time machine is not found or not to be made up to anything. Given the impact it would be far more dire for the world to fall into the hands of irresponsible people, it could be a weapon of mass destruction more powerful than a nuclear bomb or disease outbreaks.