Just to clear the confusion among audience for this excellent serious sci-fi movie

Rating: 10/10 (29 September 2011)

Let me try communicate well. Quantum parallel universes are the premise of this movie and the machine built by the physicist in the movie. The thread that the soldier asked for executing the mission is in one quantum universe. He had the opportunity to enter another quantum universe in which the explosion has yet to happen. This opportunity is introduced due to the fact that the scientist is able to capture the overlap between multiverse after seizing the brain state of Sean just 8 minutes before the explosion. Multiverse overlaps when their states match at one time instance. The scientist will be able to hold on 8 minutes of another quantum universe and call the soldier back to the reference thread, as long as Sean exits the other quantum universe in a death state at the end of the 8 minutes. Otherwise, there will be difficulty, as shown in the movie. It all occurs as planned since the soldier is called back. However, the last time the solider enters a (not the) quantum universe that overlaps with the reference universe, he was terminated at the reference thread by the captain. Once the reference quantum universe vanishes according to the soldier brain state as he was put to death at the end of the 8 minutes in the main thread, the other quantum universe departs the overlap instance and Sean continues to exist in that quantum universe with all memory acquired from the reference universe (multiverse communication succeeds). Of course, once he texts the captain in that alternative quantum universe, the captain in that quantum universe will receive the text message before she actually proceeds with the mission. In the ending, the soldier realized that and informs the unaware captain and the scientist in his alternative universe about this aftermath of a successful multiverse joins and departs that is a successful multiverse communication.
The movie is an accurate depiction of multiverse communication.