Christopher and Peter travel the extreme roads in Scotland's stunning Highlands. They take a vintage three-wheel rally car up the notorious Inverfarigaig Corkscrew and catch an old car ferry to Skye.

Peter and Chris travel through dream driving country into the Rhondda Valley, across the Brecon Beacons into breathtaking Snowdonia. Along the way, they investigate the subversive origins of the AA, recreate a vintage speed trap, hitch a lift to the top of the world's biggest slate mine, and meet up with one of Chris's oldest friends.