This is the theory of parallel universes. First of all, there are countless Doug crossings in this play, there is no first (there is no beginning of crossing) but there is the last Doug crossing, because the conditions for crossing are: the explosion of the ship plus the death of the crossing Doug plus the death of the heroine ( The previous Doug may choose not to travel back, but the next Doug may still travel back. Anyway, there is a chance that two Dougs will travel in a row. This is the case of the movie, but all Dougs except the last one failed, resulting in for the next crossing).
What the previous Doug did was discovered by the current Doug (the main line), such as the blood paper in the bathroom, the ambulance at the dock, a piece of paper that caused Larry to die, and a save in the hostess' house. Then Doug catches the murderer (the murderer may have seen the crossing Doug before the explosion, so he may know that the last one he crossed, so he said to the mainline Doug that no one can change fate, it will only speed him up, but he did not right Doug says he knows because it keeps the cycle going and that's what he's saying is never over/maybe the killer took this Doug as the last Doug who crossed over and thought they hit it).
Doug didn't know at this time that the last Doug had crossed over and failed, so he chose to cross back, and then he experienced the ambulance crashing into the house, and went to the hostess's house to save (in order to encourage himself, it was the same as the previous one, but he Didn't realize there was a previous one), and then he asked the heroine not to wear red clothes just for his own peace of mind, throwing away the blood tissue and leaving fingerprints (because this house is not yet a crime scene, so he doesn't care) but he is in At this time, when I think about it, isn't this what happened in his time and space, so he understands that there is another time and space that he passed through, but the heroine died in the end, and the ship exploded, so he knew that there was another one He failed, and should have died. He chose to take her away in order to protect the heroine, lest the criminals worry that she was not dead. Before planting the bomb, he came back and brought her to the pier to be killed and thrown into the river (time at 9:50- 10:04, because Doug, who passed through last time, should have left after talking to the heroine at 9:42, and the heroine received a call at 9:50, and her father called at 10:04. People listened) (this is what happened in his original time and space) (finger cut off probably because he was afraid she didn't wash his blood and left it in the crevice)
(The murderer should first go to the heroine's house to kill the heroine, then throw the corpse to install the bomb (the murderer did not expect the heroine to be found at 10:42) and then go to the bridge to watch the play.) And Doug knew in the last time and space He would be on the bridge, so he looked at the bridge deck and found no one, so he felt something was wrong, because something must have happened different from the last time and space (the reason is that the last Doug didn't bring the heroine, he Maybe the murderer's black car was parked elsewhere, and the murderer couldn't see it, but this Doug brought the heroine and accidentally parked the murderer's black car on the road for the murderer to see, so the murderer didn't go to the heroine's house to check or not. Go to the bridge and go directly back to the boat) In the end, Doug and the heroine killed the murderer together. The ship did not explode, but Doug was killed by the bomb in the water.
The ship didn't explode, so Doug in this time and space would not travel again, and he ended up with the heroine.
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