Harry Cooper (voice)
Ben (voice)
Barbara (voice)
Tom (voice)
Judy (voice)
Sheriff McClelland (voice)
John (voice)
Helen Cooper (voice)
Vince (voice)
Radio Announcer / General / Field Reporter (voice)
TV Commentator / Reporter #2 (voice)
Dr. Grimes (voice)
Posse Member (voice)
Karen (voice)
Scientist #1 (voice) (as Dave Zyler)
Scientist #2 / Police Officer (voice)
Reporter #1 (voice)
Additional Voices (voice)