The Gang crash into a world under their own frozen one that still houses dinosaurs, a subterranean hothouse if you will. From there on in it's a meandering race to locate their idiot prone buddy Syd, who's become self appointed mum to three young carnivorous reptilians. As an adult you do feel I.A.3 is a ruthless example of franchise cash in, but it looks great, there's no shortage of laughs and most important… the kids will still love it.