Behind the scenes: Episode 4, Series 22

Last week you saw homemade ambulances, Jeremy Clarkson in a sausage-shaped predicament and Richard Hammond's personal dignity violated by an inanimate victim. For this week's show, we've taken a new subject matter: CARS!

Yep, episode four of the new series of TG telly promises to be a good ‘un, with reviews of BMW's new i8 and M3, and the new Mercedes AMG GT supercar in the bill. Oh, there's also a bit with an old Land Rover on the side of a very steep dam.

Not only that, we've also rounded up some STARS! This week, we've corralled together none other than Margot Robbie (The Wolf of Wall Street) and The Fresh Prince of Bel Air/Bad Boys/Independence Day star himself, Mr Will Smith! Here's him with Mr Stig.

So take a seat, have a click through this exclusive preview gallery and prepare to get jiggy wit it...

Pictures: Mark Yeoman

Will: "Stig, how am I doing? Stig? Are you listening?"

Stig: "-. --- .-- / - .... .. ... / .. ... / .- / ... - --- .-. -.-- / .- .-.. .-.. / .- -... --- ..- - / .... --- .-- / -..-. / -- -.-- / .-.. .. ..-. . / --. --- - / - .-- .. ... - . -.. --..-- / - ..- .-. -. . -.. / ..- .--. ... .. -.. . / -.. --- .-- -. .-.-.- .-.-.- .-.-.-"

Will cracks a joke with the TG production team, who are all oblivious to his impending desire to FLASHY-THING them.

Will was decidedly unimpressed that the license plate did not say ‘Fresh' and there was a distinct lack of dice in the mirror.

Margot's delight at the Stig's relationship status would soon subside as she found out he doesn't understand humans.

Margot's impersonation of our Richard Hammond waxwork was a hit.

"Yes, yes, he's the Fresh Prince. I get it. Just tell me how to DESTROY HIM."

Can Margot beat Will on our celebrity lap-time leaderboard? Will our little Astra survive the cosmic power of two Hollywood mega-stars? Can Hammond ever recover from his Hambulance terror of last week?

Find out on Sunday 15 February, 8pm, on BBC Two and BBC Two HD.