Näitlejad

• Gary Dourdan — Gary Christie
• Sigourney Weaver
• Winona Ryder — Annalee Call
• Brad Dourif — Dr. Jonathan Gediman
• Ron Perlman — Ron Johner
• Michael Wincott — Frank Elgyn
• Dan Hedaya — Gen. Martin Allahandro Carlos Perez
• Dominique Pinon — Dom Vriess
• Raymond Cruz — Pvt. Vincent Distephano
• J.E. Freeman — Dr. Mason Wren
• Rico Bueno — Sleeper
• Steven Gilborn — Father (voice)
• Leland Orser — Larry Purvis
• David St. James — Surgeon
• Kim Flowers — Sabra Hillard
• Nicole Fellows — Young Ripley
• Tom Woodruff Jr. — Lead Alien
• Rod Damer — Soldier
• Daniel Raymont — Soldier
• Cris D'Annunzio — Soldier
• Archie Hahn — Newborn