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)