Robin Dunne as Dean

Robert Knepper as Dr. Abbot

Sunny Mabrey as Sara

Amelia Cooke as Amelia

Christopher Neame as Dr. Nicholas Turner

Patricia Bethune as Colleen

Michael Warren as Agent Wasach

Natasha Henstridge as Eve

John Paul Pitoc as Hastings

Joel Stoffer as Portus

James Leo Ryan as Yosef

Savanna Fields as Young Sara

Reed Frerichs as ISD Staffer

Marc D. Wilson as Crew Chief

Matthew Yang King as Specialist Robert Kelley

Rick Dean as Cobb the Gas Station Guy

Christopher R. Gillum as Young Portus

Billy Bacon as Commander

Jim Cody Williams as Farmer at Gas Station

Mark Zecca as Tour Guest

Sean C. Ching as Grad Student

Dan Wells as Jake

Frank Crim as Communications Officer

Boni Yanagisawa as Female Student

Rob Hinderstein as Security Guard #1

Carl Ciarfalio as Security Guard #2

Troy Blendell as Autopsy Tech

Keith Camire as Military Soldier (uncredited)

Josh Cook as Jock (uncredited)

Joss Gomez as Student (uncredited)

Kari Ann Peniche as Cheerleader (uncredited)

Jason Sarcinelli as Adult Male Alien (uncredited)

Marc Scizak as Football Player (uncredited)