As with previous years, eight people, nominated by their family or friends, enter the Driver Rehabilitation Centre to improve their driving skills.
Mariah is also called out on her attitude toward her drunk-driving and Cam informs her that should she kill or injure someone while doing so, she would face near-certain jail time.
After the Eye of the Needle, the experts confront Ian about the list he gave Andrew prior to the Riding the Rails Challenge, noting that the issues he listed indicate that he is someone who until now simply wasn't prepared to put in the effort required to be a good driver, rather than suffering from any technical issues; Ian in turn admits that he has decided to give up being a taxi driver and that the only reason he was even doing the job was to fund the journalism degree that he's currently undertaking.
Before Ian drives himself home, Andrew makes him remove the "Taxi" sign from his car and wishes him a successful career in journalism.
While Jason feels that he deserves to graduate, the experts quickly agree that George, having already been passed over twice on the grounds that his arrogant attitude and the possibility of him teaching bad habits to Cody was a deal-breaker and Santana showed the best attitude in the previous episode, is the overwhelmingly obvious choice to graduate for performing the best in all three challenges this episode; the clear improvement in his attitude and the experts no longer needing to worry about him passing on bad habits to Cody helps seal the decision and George becomes the third graduate.
Shyamala and Tim, on the other hand, feel that Siham is the person who deserves to graduate, as they consider her the most technically adept of the five remaining drivers, despite her confidence issues.
This leaves Andrew to cast the deciding vote, but elects not to back Chanie or Siham, as he feels they are both still lacking in focus and confidence, respectively.
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.
Before she leaves the Driver Rehabilitation Centre, however, Mariah gets a tattoo on her left forearm, to specifically remind her never to drink-drive again (Mariah appears in a bonus clip of Canada's Worst Driver 12 in an attempt by Andrew to reform eventual "winner" Krystal McCann from texting and driving prior to Krystal's final drive).
Their discussions are not shown, but in the end, Andrew gives Tyler his license back, telling him that, as bad as his performances in the reversing and Icy Corner challenges were, they were still the best of the group.
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 and advocates naming Chanie and Jason the joint-worst, ultimately giving both a part of that season's trophy), but Cam actually deems Siham to be Canada's Worst Driver, feeling that the mistakes she did make were the ones most likely to result in a fatality than any of the 24 mistakes Chanie committed.
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.