2. Ice Age

Over the last two-and-a-half million years, Britain has experienced numerous deep freezes that left the land uninhabitable and locked under ice sheets over a mile thick. Tracing the movement of the frozen wastes, Tony visits some of the country's most scenic spots - including the Scottish Highlands and the Lake District - to explore its chilly past. Ending up in London, Tony unearths the bones of monkeys, rhinos and lions that once lived on the banks of the Thames.

3. Gold Rush

Gold has been cherished since the dawn of human history and while these islands might be more readily associated with coal or tin, there is a surprising amount of bling lurking in Britain's rocks. Heading to Wales, Tony investigates an ancient Roman mine before visiting Britain's only working gold mine in Northern Ireland. Finally, our host traces the incredible geological forces that created this valuable commodity and pans for gold in Scotland.