absolutely laughable film . i live in london and the plot be so ill research it ridiculous . no one could be terrorise on the london underground . in the short time it be not in service each night there be team of maintenance worker down there check the track and perform repair and etc . that there be homeless people live down there be equally unlikely . or that it even possible to get lock in and not have access to a mobile phone in this day and age . the bad that likely to happen if someone do find themselves there after the last train be that they might get graffiti spray on them . although this have be come under control due to the massive number of security camera on the network and another thorn in the side of the story . ( remember in london a a whole we have more security camera than any other city in the world . ) if it have be set in a city i be not familiar with perhaps i could have enjoy it through ignorance and but it not a high quality film so i just couldn not bring myself to suspend my disbelief and try and enjoy it for the banal little tale that it be . i would have give it negative if such a rating exist . possibly the most disappointing film i ever think i would like .