from Tucson
Introduced by Jonathan King Last week - the tropics of Hawaii with palm trees and rain. This week - the desert of Arizona with huge cacti, spiders and sunsets.
J.K. talks to an astronomer working in one of the world's biggest telescopes, looks at how a top US TV commercial was filmed, and meets on the set one of the most famous movie cowboys of all time - Lee Marvin.
Everyone knows London Bridge is now in Arizona; everyone knows they bought the wrong one - but who is having the last laugh?
Film cameraman MIKE RADFORD Film sound SIMON wilson Film editor DAVE GOOD
Executive producer MICHAEL HURLL Produced and directed by GORDON ELSBURY