All four episodes of the ITV travel series following comedian Billy Connolly as he completes a lifelong dream by travelling the world's most famous highway.

Mounting his trusty trike, Billy puts a modern spin on 'Easy Rider' as he journeys along the 2488 miles from Chicago to Santa Monica. To the accompaniment of some of the best American music of the 20th century, Billy stops off along the way to meet some of the highway's biggest fans, and offers his own unique take on some of American history's standout moments.