The Stig tears up the track in an insanely-tuned Mercedes SL and Richard and James attempt to build a working space shuttle out of a Reliant Robin. Plus, Hot Fuzz actor Simon Pegg is the Star In A Reasonably Priced Car.

The team build their own stretch limos out of the most improbable cars and then use them to take some top celebrities to the Brit Awards. Plus a good ol' boy Ford Mustang whoops around the test track.