Part 2 of 3.

Hidden away beneath a large slab of stone in an ancient tomb, lies one of the most exciting discoveries of the last five years - beautiful carvings of adult red deer, the first animal representations in Scotland. This is just one of the remarkable finds in one of the most extraordinary prehistoric landscapes in Scotland: the magical and mysterious Kilmartin Glen.

Join Tristan Hughes as he ventures through Kilmartin on a journey that takes him from the Stone Age to the Bronze Age - uncovering the many secrets this Glen holds. Tristan explores Stone Age rock carvings with Dr Joana Valdez-Tullet and crawls into the elaborate tombs of Bronze Age metal tycoons as we discover that for more than a millennium Kilmartin Glen was a vibrant centre of prehistoric Scotland, boasting connections stretching from Portugal to Orkney.

We get hands-on with prehistory, recreating 5,000 year old rock art with Dr Hugo Anderson-Whymark and investigate the National Museum of Scotland's amazing Early Bronze Age archive with Dr Matthew Knight. Dr Alison Sheriden then joins us to explore how a massive prehistoric migration radically altered both Kilmartin Glen’s landscape and its people.

Tristan investigates the prehistoric revolution that the people of Kilmartin Glen experienced 4,000 years ago, as Britain moved from a world of stone to a world of metal.