The remaining drivers' difficulties with merging skills are tested; our abysmal drivers must navigate a tight straightaway, perform a shoulder check and exit safely, which is easier said than done; they practice what they've learned on real roads.

The final four drivers tackle the toughest challenges they've seen to date; it starts with the most challenging Eye of the Needle course we've ever created, and ends with a crash course on performing the perfect doughnut.

The remaining drivers head off the beaten path in a four-wheel drive truck to learn how to operate a vehicle in unfamiliar terrain; the water tank course.

The six remaining drivers get thrown into the deep end with tests dedicated to driving a stick shift; the drivers search for balance as they manoeuvre themselves onto a giant teeter-totter; the Water Tank Challenge returns.

The remaining three drivers face the biggest challenge in the show's four-year history, the Mega Challenge; it's a combination of everything they've had to learn during the series; the final exam is a drive though Toronto in rush hour traffic.