Tobor the Great

Charles Drake

Dr. Ralph Harrison

Karin Booth

Janice Roberts

Billy Chapin

Brian 'Gadge' Roberts

Taylor Holmes

Prof. Arnold Nordstrom

Steven Geray

The Foreign Spy-Chief

Henry Kulky

Paul (Spy Henchman)

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Franz Roehn

Karl

Hal Baylor

Max (Spy Henchman)