• 
  Adrienne Barbeau

  Dr. Withersford
• 
  Casper Van Dien

  Lt. Col. Harold Richards
• 
  Sean Maher

  Dr. Abe Anderson
• 
  Eden Riegel

  Mary Anderson
• 
  Kevin Yon

  Kurt Westin
• 
  Liam Matthews

  Lynch (as Matthew Tailford)
• 
  Jonathan D'Ambrosio

  Grad Student
• 
  Jennifer Kincer

  Nurse Walters

• 
  Kaelin Stockwell

  General's Aide Washington
• 
  Chris Newman

  Decker
• 
  Andrew Huff

  Scientist
• 
  Leroy S. Williams III

  Staff Sergeant Powells
• 
  Leila Garza

  Nurse Knight
• 
  Jason Praet

  Guest #1
• 
  Bob Amore

  General Andrew Lawrence Cristie