A troubled teen (Ben Foster) who shows signs of violent behavior may be targeting his high-school classmates. Duncan: Tom Cavanagh. Ellie: Janel Moloney. Sean: Randy Harrison. Jenny: Jane McGregor. Brad: David Paetku. Mark: Eric Johnson. Kurt: Kristian Ayre. Zach: Brent Grenen. Principal Meyer: Gillian Barber. Adams: Eric Keenleyside. Karen: Glynis Davies. Vanderhoff: Ryan McDonald. Alex: Chad Faust. Olson: Andrew Sabiston. Green: Mitch Davies. Chief: Garry Chalk.