We noted last time that there was a further complication with the locket; there are a few other little problems that are very difficult to resolve.
The locket catches her eye because it is caught on the grate, dangling where it will dance in the light; she recognizes it as a duplicate of the one still around her neck, but then drops it. Because she drops it she sees all the others; because she is looking at all the others, she hooks the locket around her neck on the grate, and loses it as the chain breaks. That, though, means that the locket she just dropped is not caught on the grate, and neither is the locket she first saw. The next time through the loop, the “second time through” Jess will not see the lockets at all, and will not lose hers; and since she will neither see them nor lose hers, no subsequent Jess will do so. Yet if that is the case, we have no way for the lockets to be there at all.
The answer must be that there is a way in which she loses the locket when she does not see them, by which it falls from her neck and gets caught on the grate. It seems improbable; there is no obvious way for this to happen. However, it sets up a sequence in which she sees nothing, drops her necklace and does not realize it, and it gets caught in the grate; the next iteration of her sees the locket, drops it, loses the one she is wearing also, and leaves nothing for the next iteration to see, who, seeing nothing, accidentally drops her necklace to get it caught in the grate. It is another way in which the timelines must differ for anything to work at all.
There is also the problem of the first note. Second-time-through Jess finds a note in what she recognizes as her handwriting; she copies the note to confirm this, and now there are two; eventually there are about twenty-five, and presumably they continue to accumulate. Yet why, and when, did she write the original? Second-time-through Jess does not understand the idea that once they are all dead the loop will repeat; the original note would have to have been written by third-time-through Jess. Yet that means that third-time-through Jess is trying to communicate to herself, and she has no reason to do that until she is faced with the challenge that her duplicate self is about to kill her. In order for any of the notes to exist the first one must exist; but we cannot imagine any scenario in which the first one would have been created. Something very different must have happened on the earliest repetitions of history.
There is also a body problem. Sally’s bodies are piling up on the top deck, and Jess tosses Downy’s overboard; it seems that Victor is hard to kill, but eventually falls overboard unseen. However, nothing is ever done to remove Greg’s body from the theater–and thus every time Sally and Downy reach the theater, there should already be a dead Greg waiting, and another dead Greg should be added, and these bodies should accumulate just as Sally’s do on the top deck.
The body problem is further complicated by the changes in history–we know that the third group to board is attacked in the theater, and Downy and Sally are both killed by the sniper there; but the second time through, their bodies are not there when they arrive, even though when they are killed elsewhere their bodies remain for the next iteration. Did someone move the bodies? Jess did not do it then, because the Jess for whom this was the first time through was fleeing and the third time through Jess was pursuing, and the second time through jess was in the hold reading papers and looking at lockets.
In a similar way, the blood trails also should be accumulating–the fresh blood left by wounded characters should be dripped atop residue of old blood from the previous run, because blood and bodies remain (they did in the bathroom, and on the top deck). Yet the blood is always fresh, as if someone removed the old blood on the reset.
But compared to some of the problems that remain, these are relatively minor; they are more like continuity errors, points the filmmakers missed. There are still several very large ones awaiting our attention.