A crack team of scientists headed up by world renowned evolutionary scientist Professor Nick Cutter (Douglas Henshall) are recruited by the government to investigate a series of dinosaur sightings. From a Gorgonopsid rampaging through the local woods, to a swarm of giant spiders in the tunnels of the London Underground, they find themselves doing the monster mash with some seriously beastly opponents.

Long extinct creatures are tearing through a series of rips in time, and as the seemingly impossible becomes a terrifying reality, Cutter and his research assistant Stephen Hart (James Murray) struggle to find answers. Enlisting the help of zoologist, Abby Maitland (Hannah Spearritt), and student palaeontologist Connor Temple (Andrew-Lee Potts), the four work to uncover the secrets of the temporal anomalies.

In doing so, it swiftly becomes clear that all traditional methods of research have become extinct. Aided and abetted in equal measures by shadowy government officials James Lester (Ben Miller – The Worst Week of My Life, Johnny English) and Claudia Brown (Lucy Brown – Sharpe, Whatever Love Means, North and South), the team find themselves heading into previously un-chartered territories. As the past threatens to invade the present, and destroy the future, Cutter’s crew face a life and death race against time.

As history roars off the pages of his books, Cutter’s own, intensely private battle continues to rage. Haunted by the disappearance of his wife, Helen (Juliet Aubrey) some eight years previous, he has never given up hope of finding her alive. As the prehistoric investigation intensifies, he begins to suspect that events are somehow linked.