Sherlock and Star Trek: Into Darkness star Benedict Cumberbatch takes to the Top Gear track to set a lap time in the reasonably priced Vauxhall Astra.brFilm director Ron Howard explains his strategies for setting a lap time around the Top Gear track. Will F1 legend Niki Laudas advice be useful? Subscribe to see .brLegendary Areosmith front man Steve Tyler is the Star in the Reasonably Priced Car. How many puns can Dalton fit in? Subscribe to see all the reviews, .br Dalton and the TopGear.com team chat to Formula 1 driver Mark Webber about his lap around the test track and if hes learned anything from The Stig.