Still the Enemy Within

Christmas, 1995. As Scotland reels from a devastating loss of industry, a man is trapped in an escalating nightmare. Forced to follow a series of bizarre and deadly instructions contained in red envelopes, he is soon stranded in the snowy wastes of the Scottish Highlands - his fate bound to a stranger he finds caught in the same brutal game.

Each episode tells the dramatic story of an individual dinosaur whose remains are currently being unearthed by world-leading dinosaur hunters. As the dinosaurs' bones emerge from the ground, their prehistoric stories are brought to life with state-of-the-art visual effects - making each episode a gripping dinosaur drama based on the very latest evidence.

Accounts of some of the most extraordinary tales of scammers and fraudsters who have used the internet to find their victims and to lure and con them, with terrifying and sometimes deadly results.

An investigation from the National Crime Agency uncovers the UK's biggest online child abuse scandals, revealing the hundreds of British teens who have been tricked into sending indecent selfies to strangers online.