OMG!
This has GOT to be one of the funniest Top Gear episodes I've ever seen.
It had me in stitches and the guys (Jeremy, James and the Hamster) were having so much fun with it they could barely contain themselves.
It all starts with a complaint as to why there are no convertible people carriers (more than 2 seaters) after they "review" a hideously embarassing hot-pink Nissan Micra...
They buy a Renault Espace (Think Dodge Caravan) and they chop the roof off and make their own custom "convertible" top.
But it's not over yet:
To prove the worthiness of their design they have to pass 3 challenges:
1) Speed to 100mph with anything falling off
2) Drive through a Safari wild animal park
3) Drive through an automated car wash
Enjoy!