While Cutter is reeling from the revelation that Helen helped Leek capture creatures from anomalies, Connor and Abby come face to face with Caroline. Abby demands to know the whereabouts of Rex but Caroline confesses she doesn’t know and she pleads with Connor to forgive her.

Meanwhile Leek releases a Silurian scorpion at a busy beach and tells Lester to back off or there will be creatures released throughout the UK. Lester doesn’t know that Cutter and the rest of the team are captured, and the only person he can reach is Stephen. Stephen responds but he tells Lester this will be the last time.

Whilst Stephen battles the scorpion, Abby, Connor and Jenny face a hungry sabre tooth cat. Cutter watches on in horror. In a desperate attempt to save them he makes Leek plug his laptop computer into the mainframe. By doing so the systems all suddenly fail and Cutter reveals Connor planted a virus in Leek’s laptop which he just uploaded. The doors open allowing Connor, Abby and Jenny to escape, but so too do the doors of all the animal cages.

The team try to find their way out but in a bunker filled with rampaging creatures and the going is tough. Abby finds Rex and with his help they find a ventilation shaft to ground level and alert Lester to their whereabouts.

Meanwhile Cutter is being hunted through the bunker by one of Leek’s future predators. In a gruelling fight Cutter manages to defeat the predator, but his relief is short lived when Leek reveals he has a whole army of future predators, all under his control via neural clamps devices implanted in their spinal columns.

Faced with certain death Cutter manages to destroy one of the neural clamps. It short circuits all of the other and in so doing releases the future predators from Leek’s control. As the creatures from the future turn on their former captor, Cutter takes his opportunity to escape the immediate danger. With the future predators now on the loose, the team realise that if they escape the safety of humanity in the present is under threat and one member is forced to make the ultimate sacrifice. The race is on to save the world but who will survive to continue the fight?

Saturday 23 February 2008 6:30pm - 7:30pm on ITV1.