A mediocre film, very disappointing, I expected it to be much more frightening than it was. The storyline was good, but the timeline totally unbelievable. As far as the 'creatures' were concerned, don't be fooled (like I was) by the illustration on the cover of this DVD! I very nearly gave up watching, but stuck with it until the end. This is a film mainly for older children, definitely not an adult movie. Acting was okay, script okay apart from the timeline regarding the development of the creatures. Parts of the film seemed familiar, probably because I was reminded of other similar, but far better, sci fi movies. I normally keep DVDs that I buy, but this is one for the charity shop!