Set at a ten-year high-school reunion and interspersed with visually charged flashbacks, 'Reunion' tells the story of the victims killed in the Columbine Massacre and what their lives might have been like had they not been cut short.
| Actor | Role |
|---|---|
| KKelly AlbanoCassie (as Kelly Marchand) | Cassie (as Kelly Marchand) |
| EEben KostbarJohn | John |
| BBlair WilliamsonKyle | Kyle |
 Megan Taylor HarveyLauren | Lauren |
 Aaron MasseyDaniel R. | Daniel R. |
| DDaryl A. ThomasDaniel M. | Daniel M. |
| DDavid ManigaultIsaiah | Isaiah |
| DDerek ArmstrongMatt | Matt |
| CChris PilonDave | Dave |
| AAmber SlavenRachel | Rachel |
| JJonny LewisKyle's father | Kyle's father |
| AAngela RachelleJohn's wife | John's wife |
| DDarrick TrimbleSteven | Steven |
 Dave KirkpatrickKiller #1 | Killer #1 |
| DDave Ryan ArdiRachel's husband | Rachel's husband |
| CCole DavidLauren's husband (as Cole Siemers) | Lauren's husband (as Cole Siemers) |
| TToni GraftonDaniel's girlfriend | Daniel's girlfriend |
| CClay TurkCorey | Corey |
| NNadeya WardKelly | Kelly |