Joe Lando as Major Richard Tunney

Lisa LoCicero as Susan Foster

Josh Coxx as Jack McKenna

Blake Gibbons as Rork

Hudson Leick as Tiffany Smith

Michael Dorn as General Buskirk

Bill Mumy as Major Keith

Alexandra Paul as Marlon Adams

Robert Picardo as Dr. John Foster

George Takei as Major Lane

Tim Thomerson as Admiral Harrison

Roark Critchlow as Daryl Cage

John Henry Richardson as Dr. Trent

Mike Baldridge as Dr. Virgil Finley

Paul Logan as Saunders

Diana Terranova as Dr. Nava

Yvonne Sciò as Victoria Scott

Clayton Landey as Major Steve Tyler

John J. Dalesandro as Shane

Tony Gonzalez as Derek Williams

Adam Lieberman as Lt. Bill Gordon

Terrell Tilford as Mike Kirby