Mega-beasts from the primordial past invade modern-day Britain in this new drama blockbuster from the makers of The Lost World and Walking With Dinosaurs.
Professor Nick Cutter (Douglas Henshall) is an evolutionary zoologist with expert knowledge of creatures that ought to be long extinct. When one of his nerdy students, Connor Temple (Andrew-Lee Potts), tells him that there may be something beastly lurking in the Forest of Dean, he takes lab technician Stephen Hart (James Murray) to explore.
On the way they bump into government investigator Claudia Brown (Lucy Brown) and local animal handler Abby Maitland (S Club 7's Hannah Spearritt), who has just made a startling discovery of her own - a tiny flying reptile that she could swear looks more like a dinosaur than a lizard.
The team's suspicions are dramatically confirmed when they stumble across a series of much bigger critters from the Permian Era (250 million BC) amongst the trees, and not all of them are vegetarian, or friendly. Hunting down the source of the dinosaur invasion, they come across a shimmering pool of light in the heart of the forest. It's an anomaly - a rip in the fabric of time which is acting as an open door into prehistory.
But if dinosaurs can arrive in our world, can we go to theirs? There's only one way to find out and Professor Cutter - whose own wife disappeared in the forest eight years ago, under mysterious circumstances - is determined to make the trip...