Canada's Worst Parking Lot: All the drivers admit to having caused at least one accident while in a parking lot (even Siham, who is regarded as the best-behaved of the drivers, once broke her driving-side mirror), leading to this semi-regular challenge being held. Each driver has a different car, and is required to reverse into a parking spot when it opens up; furthermore, each driver is permitted no more than three or four turns while parking. Mariah and Siham quickly get into parking spots, but fail for taking too long to do it. Chanie (who is disadvantaged by having by far the largest vehicle) reverses into a marked "parent with child" spot and then smashes the sign, while Jason hits a bus and then illegally parks in a disabled spot, a mistake which Mariah then also makes. It then turns out that Mariah is severely ignorant about parking laws, which she denies even exist. Tyler becomes the first person to park, doing so without any trouble, while Chanie fails another two attempts due to hitting another car and poorly aligned parking respectively. Siham then passes, with Mariah also passing shortly after that, though their techniques are far from perfect. After more and more failed attempts from Chanie and Jason, Andrew calls a halt to the challenge, and declares that they have both failed.
Parallel Parking: Due to the generally poor performances in the last challenge, a full parallel parking challenge is held next, with Tim giving each driver extensive lessons in how to park without hitting anyone or anything. Each driver has ten attempts in the decommissioned police cruiser. Siham is first-up, and passes without making a single mistake. Mariah also passes, but takes six attempts. Despite being the best performer in the previous challenge, Tyler completely forgets the lesson, and never even comes close to parking up correctly, failing all ten attempts. Jason remembers the lesson and passes on his fifth attempt. Chanie's performance is by far the worst, as she hits more things on her first run alone than all the other drivers combined – and shockingly, is oblivious to having hit anything at all. Her runs all end in failure.
Cadillac Challenge: The Slalom: In a variation on the third part of the initial skills test, each driver has to first slalom around five foam people at 80 km/h, then move the people closer together to the shortest distance they feel safe steering around. Jason can't even complete the initial run, but still insists on a totally unrealistic 10m reduction in the distance between each figure; unsurprisingly, he fails by smashing two of the figures, and then ends up in the adjoining field. Siham easily completes the first section, and also completes a course with a 2m figure distance reduction, causing Andrew to confidently predict that Siham will graduate this episode. Mariah passes the first section just as easily as Siham, and to Andrew's shock performs equally well in the second section despite an ambitious 5m reduction, causing Andrew to admit that what looked like a near-certain graduation for Siham now looks like being a toss-up between her and Mariah. Chanie relies on Jeremy to watch her speed, and posts a thoroughly dismal performance on her first run. She elects to take her second run with the figures spaced the same distance apart, but she closes her eyes during the run, which ends up being just as bad as the first one, and also smashes off the Cadillacs' rear bumper. Tyler has the final run, and his first attempt is just as bad as Chanie's corresponding run, in large part because he fails to grip the steering wheel correctly. Shockingly, Tyler insists on the same 5m reduction that Mariah had, and his second attempt not only results in him smashing the same number of foam people as in his first run, he locks up the brakes and spins completely out of control, cementing this as the worst performance in the challenge.
Mariah and Siham are easily agreed on as the only two possible nominees, as they both passed every challenge this episode and both want to graduate. Jason half-heartedly puts himself forward to graduate, and is immediately shot down, while Tyler and a tearful Chanie admit that they both need a lot more work.
Tim backs Mariah to graduate, feeling that she has superior technical skills and more confidence compared to Siham, something which he feels is particularly obvious in the lessons he's been giving drivers in-between the episodes. Shyamala also backs Mariah to graduate, for having drastically reformed her attitude. Philippe and Cam, however, back Siham to graduate for performing better than Mariah in all the challenges. Andrew is left with the deciding vote, and chooses Mariah as the next graduate. Before she leaves the Driver Rehabilitation Centre, Mariah gets a tattoo on her left forearm, to specifically remind her never to drink-drive again.
Web Extra: Parallel Parking, Cont'd: Extra footage of the drivers' attempts at the parallel parking challenge is shown. Siham admits gaining a lot of confidence after her practically flawless performance; Mariah complains that parking spaces should be bigger; Chanie optimistically asks Jeremy whether he'd trust her parallel parking his truck, which he immediately answers in the negative; Tyler admits that he didn't carry out a single part of the challenge correctly, and is ashamed of his performance; Jason says that he's "won the battle, but not the war."