Plot hole: The security measures for the prison depicted in this film are completely ridiculous. Not only are the prisoners confined to one central area and greatly outnumber the guards, but the cryostasis cells the prisoners are kept in are designed in such a way that the prisoners are able to simply step out and easily overwhelm the guards when the doors are opened, with the prison's backup plan being to release sleeping gas in the area to regain control. If the prison was so concerned about having to go the measure of using sleeping gas to control the situation, then surely they could have simply designed the cryostasis cells to have the prisoners restrained as a fail safe in the event that they are all simultaneously released without authorization in order to prevent the prisoners from overrunning the prison as easily as they are depicted doing. Since the prisoners are being kept in cryosleep, there is no reason to not have them restrained, because they have no need to move around. For a prison that is repeatedly described as being maximum security, it sure has some glaring weaknesses. (00:13:30 - 00:18:45)
Plot hole: Hock sneaks a gun into the prisoner interrogation area because he is told that guns are not allowed there. If the prison was so strict about keeping guns out of that area then they would surely have metal detectors to prevent such a thing from happening. (00:15:25)
Suggested correction: Not a plot hole at all. Most of the people who are allowed in those areas will be government employees, who will be deemed trusted enough to follow the rules.
Plot hole: Alex walks right past Snow, Emilie and Mace as they hide from him, and they are to his left. He only takes a few steps away when Emilie's necklace begins beeping. That instant, Alex turns around as he hears it and quickly doubles back and looks where the three once were but are now gone. He then turns to his left, which should have been his right earlier and sees the necklace. For it to get there, Emilie or Snow would have had to throw it across Alex's line of sight or set it there. But he turned around instantly and would have seen that. (01:01:40)
