 Maxim GaudetteThe Assassin | The Assassin |
 Sébastien HuberdeauJean-François | Jean-François |
 Karine VanasseValérie | Valérie |
 Evelyne BrochuStéphanie | Stéphanie |
 Martin WatierJean-François (voice) | Jean-François (voice) |
 Johanne-Marie TremblayJean-François' Mother | Jean-François' Mother |
 Natalie Hamel-RoyJean-François' Mother (voice) | Jean-François' Mother (voice) |
 Pierre-Yves CardinalÉric | Éric |
 Pierre LeblancMr. Martineau | Mr. Martineau |
 Francesca BarcenasInjured Student at Copier | Injured Student at Copier |
 Ève DuranceauStudent with the Ear Injury | Student with the Ear Injury |
| MMathieu LedouxInjured Student | Injured Student |
| AAdam KoshKiller's Roommate | Killer's Roommate |
 Larissa CorriveauKiller's Neighboor | Killer's Neighboor |
| MManon LapointeKiller's Mother | Killer's Mother |
| KKim Lavack-PaquinStudent at the Library | Student at the Library |
 Mireille BrullemansAdmission Office's Secretary | Admission Office's Secretary |
| PPier-Olivier PaquetStudent at the Admission Office | Student at the Admission Office |
 Louise ProulxSecretary in Waiting Room | Secretary in Waiting Room |
 Lily ThibeaultFemale Student at the Copy Room | Female Student at the Copy Room |
| RRobert ReynaertTeacher in First Classroom | Teacher in First Classroom |
 Stéphane JulienStudent in the Escalator | Student in the Escalator |
 Pierre-Xavier MartelSecurity Guard | Security Guard |
| MMarc-André BriseboisStudent in the Stairs | Student in the Stairs |
 François-Xavier DufourStudent in 3rd Floor Corridor | Student in 3rd Floor Corridor |
 Sophie DesmaraisFemale Student - 3rd Floor Corridor | Female Student - 3rd Floor Corridor |
| AAntoine TouchetteMale Student in Common Room | Male Student in Common Room |
| EEmmanuelle GirardStudent Behind Speakers | Student Behind Speakers |
| AAnne TrudelStudent Behind Speakers | Student Behind Speakers |
| NNathalie GirardInjured Student | Injured Student |
