James May and Richard Hammond take a selection of convertables on a typical British camping holiday and find out which one is best. Jeremy Clarkson sees how a Range Rover has been turned into an off-roading powerhouse.
Plus a look at the future of motoring with the car powered on hydrogen. With guests Patrick Stewart and Jodie Kidd. Executive producer Gary Hunter ; Editor Andy Wilman BBC MAGAZINES: Top Gear. £3.60 monthly, www.bbc.co.uk/topgear