The final leg of Billy Connolly’s journey along the road that defined America, Route 66, sees him discover the oddest and cutest sights along the Mother Road and encounter the true spirit of the continent. Starting the last instalment outside Flagstaff, Billy follows the footsteps of millions of migrating dreamers into the remote mountain passes of Arizona, through the Californian deserts and urban sprawls of LA to his final destination, Santa Monica. His first stop of the evening is a spectacularly large hole, 750 feet deep and 4000 feet across. Caused by a meteorite, it's the second largest hole along Route 66 and his fascination with it is something that Billy thinks separates men from women. He then heads to the Grand Canyon, meets a campaigner trying to keep the historic route alive, and bottle-feeds a lion cub in a sanctuary for unwanted exotic pets.