After Professor Kasuga is killed by fiendish aliens for plans to a super-rocketship, his children trek across Japan, protected by the second-oldest brother, Koji, who transforms into the super-cyborg, Silver Mask.

• Toshio Shiba
• Junko Natsu
• Saburo Shinoda
• Seiichirō Kameishi
• Shūichirō Moriyama