Agent Betts
Sam, Reporter
Mayor
Steve Warren
Dr. Richard Wicks
Examiner
Prof. Strock
Judge
Dr. Farrell (as Robert Connell)
Oliver Quayle
Count Yorga
Khorda
Dr. Khorda
Doctor
Visconti
Chew'Bah
Father McFerrin
Dr. Mathers
Mark Putnam
Darius Biederbeck
Knowles
Dwight Powell
Morgan
Doc Burnside
Self
Count Yorga (archive footage)
King Faraday
Jimmy
(archive footage)
Scientist (uncredited)
Milo
Mr. Ambrose
Robert Secord
Randolph St.John
Michael Anthony
Phil (uncredited)
Dr. Prichette
Santa Rosa Teenager (uncredited)
Borg
Bob
Dr. Jones
Demon (voice) (uncredited)
Military Officer
Murray
Father Ferraro
Sam Jagin (uncredited)
Noonan
Hollis Kent
Bob Detweiler
Commander Corliss
Danny Talbert
Bushy
Howard Pascoe
Myles (uncredited)
Arnie Bullock
Dr. Wheeler
Joe Zakarian
Larry
Charlie Wendell
Andy Murray
Casey Banks
Lee Russo
Ralph Shields