• 
  Torri Higginson

  Marion Dobbs
• 
  Benjamin Arthur

  Henry
• 
  Lara Gilchrist

  Ellie Barnes
• 
  Tony Ning

  Dr. Forrester
• 
  Julian Richings

  Father Stewart
• 
  Mark Taylor

  George
• 
  Sean Kaufmann

  Bystander
• 
  Leah Doz

  Creature

• 
  Peter Blankenstein

  Uncle Peter
• 
  Mark Kalpakis

  Creature #1
• 
  Samuel Faraci

  Hunter
• 
  Breeanna Booth

  Creature
• 
  Briar Nolet

  Creature
• 
  Ruth Harris

  Dead Co-Worker
• 
  Kim Kearney

  Dead Doctor

• 
  Nancy Lala

  Dead Surgeon
• 
  Al Quong

  Bystander
• 
  Eileen Chan

  Bystander (as Eileen Chen)
• 
  Thomas Lowles

  Dead Gunshot Victim / Shooter
• 
  Benton Leong

  Dead Security Guard
• 
  Renata Lowles

  Dead Surgeon
• 
  Dan Kearney

  Dead Security Guard
• 
  Corey Brown

  Bystander
• 
  Jonny Caines

  Creature
• 
  Samantha Nemeth

  Dead Body
• 
  Ana Shepherd

  Marion's Double
• 
  Merideth Brown

  Bystander