"A young astrophysicist searches for sinister extraterrestrials looking for sanctuary for their comrades by possessing the bodies of humans."
Tom Mason
as Dr. Scott Dryden
Eric Braeden
as Leonard Nero
Melinda O. Fee
as Gwendolyn O'Brien
Fawne Harriman
as Joyce Cummings
Matthew Labyorteaux
as Timmy Garner
Ron Masak
as Harve Nelson
Caroline McWilliams
as Sue Garner
John Milford
as Eldon Gates
Max Gail
as Russ Garner
Ed Harris
as Chuck Polcheck
Hank Brandt
as Lt. Col. John Sebastian
Laurence Haddon
as Bert Fowler
Gerald McRaney
as Patrolman Ashley
Curtis Credel
as Frank Foley
Richard Lockmiller
as Patrolman Strong
Sean G. Griffin
as Dr. Conley
Christopher L. O'Brien
as Technician
Tom Lowell
as Intern
Nancy Priddy
as Teacher
Lorna Thayer
as Waitress
John Gilgreen
as Floyd
Laurie Beach
as Girl Student
Dirk Olthof
as Waiter
Tom Pittman
as Security Guard
Peter Schuck
as Orderly
William Kerwin
as Professor Reeve (uncredited)
Robert W. Lenski
Screenplay
Harvey Hart
Director
Norman Newberry
Art Direction
William Goldstein
Original Music Composer
Kirk Schuler
Sound Editor
Quinn Martin
Executive Producer
Philip Saltzman
Jim Gross
Editor
George B. Chan
Jacques R. Marquette
Director of Photography
Tom Palmer
Casting
Ralph Nelson
Set Decoration