The Forward and Reverse Slalom: The finale begins with this challenge, in which each driver has to steer a 1978 Pontiac Parisienne coupe in a slalom around four foam people, in both directions. Each driver has ten runs, and must finish the challenge within 45 seconds. Jason is first to try the challenge, and immediately manages the forward section without any trouble, but has major difficulty on the reverse section, going too slow and turning far too wide. His runs gradually improve however, and he passes on his eighth attempt. Siham gets off to the worst possible start, hitting the very first foam person in her forward run; on her second run she smashes several of the foam people while reversing, and even destroys the foam arch that serves as the challenge's starting point. Her runs get successively worse, including her leaving the track entirely on at least two separate occasions, and she ultimately fails all ten attempts. After this, she re-iterates her promise from the start of the season, that she will destroy her driving licence if named Canada's Worst Driver. Chanie optimistically predicts that she will pass the challenge in one attempt; unsurprisingly, she doesn't, and smashes a foam person in her forwards run. After a similarly poor second run, she nearly passes her third run, but ruins it by hitting the starting arch. Chanie then asks Andrew if he'll upgrade the challenge to a pass in exchange for a hug, but Andrew berates her for this, telling her that she cannot emotionally bribe people into overlooking her driving problems. The next three runs turn out to be poor ones, and the three after that are again near-passes ruined by her hitting the arch. She finally has a near-perfect drive on her final attempt, but fails as she was just two seconds too slow. Chanie is severely upset by this, but Jeremy consoles her with the fact that Siham was far, far worse.
The Mega-Challenge: With all attempts to repair the Cadillac having failed, the Mustang is called into service for this year's final rehab centre challenge.The course layout is virtually identical to the previous year, beginning with an Eye of the Needle/Slalom combo taken at 60 km/h, then a precision drive through wheel rims in both directions, during which the car must be turned around in a tight section of concrete blocks. After leaving the wheel rims, the car has to be turned around with a reverse flick, and finally negotiated through an icy corner. Chanie is first-up, and successfully gets through all the Eye of the Needle arches, but hits all the foam people between them. She drives quickly and recklessly through the precision steering section in both directions, along with hitting the car several times while turning it around, and then bizarrely decides to take a break to do her make-up in before attempting the reverse flick, which she admits she has no idea how to actually carry out. Andrew has to get in the car with her and remind her of the lesson, but when she attempts it she veers to the right and hits the wall bordering the course, a performance that she still thinks was "okay." She then fails the icy corner by taking it far too fast. Despite her overall terrible performance, she angrily denies that she will be Canada's Worst Driver, and says that Siham will be the worst. Jason is next, and gets off to a perfect start by getting through the opening Eye of the Needle and Slalom perfectly, and not hitting anything in the forward part of the precision steering section. Things quickly go wrong when turning the car around, however, and he causes even more damage to the car than Chanie did. His reverse flick also proves to be worse than Chanie's corresponding attempt, and while he doesn't speed as much as she did on the icy corner, he still goes too fast and ends up failing. His overall performance is much better than Chanie's, but Andrew feels he's still in denial about his major issues. Siham also gets off to a flawless start, though Wayne continues to micro-manage her driving; as a result of this, Andrew orders him out of the car before the precision steering section, which Siham then drives through without making a real effort to avoid the wheel rims. The rest of her run is effectively a carbon-copy of Jason's, as she fails the reverse flick and icy corner in the exact same manner that he did, leaving her overall performance worse than his, but a little better than Chanie's.
The Road Test: The road test is conducted on the streets of Hamilton, Ontario, the location of the show's decisive drive since Canada's Worst Driver 7. Jason is first to take the final drive, which is the first time he's driven in a major city with his glasses; unfortunately, they don't prevent him from missing the first turn, and his rather unsafe U-turn results in him causing a small traffic jam as he tries to get back on course. Subsequently, he runs red lights and stops at green lights, makes prohibited turns, and stops in crosswalks. He gets onto the highway safely enough, but then makes a huge mistake by slowing down and dropping gear, causing the engine to rev dangerously high before Andrew makes him put it back in the correct gear. He then misses the turn-off and makes an extremely dangerous lane change to get back on-track. Adding insult to injury, on the way back to the starting point, he parks in two spots designated for use by medical personnel only, and then urinates in public. After this, and the 16 total infractions (with $1,865 in potential fines) he racks up, Andrew predicts that the only way Jason will avoid being Canada's Worst Driver is if Chanie and/or Siham has a spectacularly bad final drive. Chanie gets off to a bad start by illegally stopping in an intersection, a mistake she makes again twice in quick succession. She follows this up with a plethora of mistakes, including illegal lane changes, driving in the wrong lane, making prohibited turns, and even driving into a bus station (the same one, in fact, that Canada's Worst Driver 8 co-"winner" Flora Wang drove into on her own final drive). As the drive progresses, Andrew notes that whereas Jason simply seemed inattentive in his drive, Chanie seems totally ignorant of the most basic driving laws. While the car is turning onto the highway, Andrew notices that Chanie is once more adopting the bizarre driving postures that she has been repeatedly told not to use; like Jason, she proves far too slow on the highway, and unbelievably, makes the exact same illegal lane change that he did while exiting the highway. When they eventually get back to the starting parking lot, Chanie tries to claim that her drive was good because she "didn't hit anything," causing Andrew to point out that in fact, her drive was even worse than Jason's with 24 infractions (and $2,715 in potential fines). Siham has the final drive, and, like Jason, she misses the first turn; she then deals with her mistake in an even more unsafe manner, cutting through a parking lot and ending up driving the wrong way down a one-way street. The rest of her drive goes mostly without incident, but she has what turns out to be the worst of the three highway drives, nearly turning off onto the wrong exit, then dangerously re-entering the flow of traffic and leaving her indicator light on. On the way back to the parking lot Andrew has to prevent her from driving into an intersection, which would have caused a collision with another car. She then goes off-course and does a U-turn in an intersection, against a red light, committing three moving violations in one go. In the end, her drive is the best of the three statistically speaking, but she still had 10 infractions (with a potential $1,450 in fines).
After the road test, the drivers each have their final meeting with the experts. Despite her earlier lackadaisical attitude, Chanie shows more awareness of what exactly went wrong as she talks to the experts. However, she then makes a shocking revelation: she's supposed to be on medication for an unspecified condition that causes her lack of focus, but was unable to get a new supply in time for rehab, and so has been driving without medication. Andrew tells her that had he known about this beforehand, she would not have been allowed to take her final drive, and Cam says that were it proven her failure to take her medication contributed to death by dangerous driving, she could face the same range of punishments as a murder charge. Harsh words are also given to Siham, due to the extremely dangerous mistakes in her highway run and what would likely have been a fatal collision on the four-way intersection; she tries to blame the former mistake on the off-ramp being too short, but admits to learning a lot from rehab. Of the three, Jason is the most willing to admit to his mistakes, but the experts are unconvinced about exactly how much he has learned.
For the first time in the show's history, there are effectively three in contention for Canada's Worst Driver due to all three drivers performing badly on the final road test. Shyamala wants Siham to be the final graduate for having the best overall track record of the final three and having what was generally the least eventful road test, but Cam actually deems her to be Canada's Worst Driver, feeling that the mistakes she did make were the ones most likely to result in a fatality. Tim deems Chanie the worst for her lack of focus and failure to take responsibility for her actions. Philippe thinks Jason is the worst, pointing out that he ran several red lights and was lucky that this didn't result in any accidents.
When the three drivers assemble for the trophy presentation, Andrew announces that Jason is the season's final graduate, as he showed the most improvement of the final three, had the best performance on the two final rehab centre challenges, and at least wasn't overwhelmingly worse than Siham on the final drive. This, therefore, leaves Chanie and Siham as the final two (only the second time in the show's history that both of the final two are women, after Canada's Worst Driver 4), and Chanie is ultimately named the worst, due to the fact that she ultimately learned nothing from her time on the show (aside from not driving distracted anymore) and showed no real improvement in her driving skill, along with a reckless disregard for safety by not telling anyone she was supposed to be on medication. While Siham does not technically graduate, Andrew notes that she did improve a lot in rehab, and believes that she will ultimately become a good driver again someday. Andrew shocks Chanie by appearing to destroy her driving licence, but reveals that what he actually destroyed was a duplicate licence she gave him on the first day of rehab, which legally she's not permitted to have. Chanie is then given the trophy and her actual licence, before being driven away by Jeremy, as the tenth person to be named Canada's Worst Driver.