The Cogs take centre stage at Britain's premier car show, but the wheels fall off when Richard returns James May's restored Triumph Stag.

New staff find themselves in at the deep end restoring a unique 1960's concept car and a rare Lotus. Richard follows his dream of big-time racing and attempts to get his hundred-year-old steam car back on the road threaten to run out of puff.

Much excitement as the Cogs head to the Isle of Man TT to launch a new British bike brand. A racing Mini needs brutal surgery after a crash. And Hadrian calls time on Cog Racing so Richard enlists old friends Les and Zog as his stand-in race team.

A 1950's American pick-up truck offers the Cogs their first chance of car-show glory, if they can restore it to pristine condition. And Richard gets a shot of driving in the biggest classic car race of the season, providing he can impress his mentor.

With the workshop haemorrhaging money, Richard brings in heavyweight help. And attempts to make money through selling merchandise backfire when Lewis massively over-orders stock.

Things appear to be on the up when they land a prestigious Morgan job, but a disastrous E-Type re-build prompts an emergency audit by Richard's mum. The verdict is damning.

The Cog respray an Aston Martin Lagonda a shocking pink for Europe's biggest car collector. Richard's daughter Izzy discovers a passion for racing. Richard gets carried away and enters them into a race, prompting a last-minute bout of parental nerves.

Richard wants to take the business to a whole new level by using the power of social media and embracing his role as Cog brand ambassador, resulting in an intrepid trip to the Middle East.