Harry Hamlin

as Richard Worthington

Teri Garr

as Susan Woolley

Terry O'Quinn

as Sergeant Don Bell

Gary Frank

as Dr. Garrick

Joycelyn O'Brien

as Barbara

Georgia Emelin

as Cristan Downey

Keith Coulouris

as Adam Cisneros

Britt Sady

as Carre Downey

Michael Flynn

as Crowder

John Daryl