Her journey takes her from Orkney to Devon by land, sea and air. In Norfolk, flint tools unearthed this year push the earliest human occupation back by 200,000 years, to around one million years ago. In Orkney an early farm yields glimpses of our ancestors' earliest religious beliefs and customs - cattle skulls buried within building walls, and tiny household goddesses. In Devon, we find one of the oldest known shipwrecks. And a bronze age burial holds a mystery, and touching evidence of grief echoing down over 2000 years.

• Alice Roberts
• Raksha Dave
• Stuart Prior