2+5: Missione Hydra
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Leonora RuffoKaena
Mario NovelliIngegner Paolo Bardi
Roland LesaffreProf. Solmi
Kirk MorrisBelsy
Gordon MitchellMurdu
Alfio CaltabianoArtie- Leontine MayLuisa Solmi
- Nando AngeliniIngegner Morelli
- Giovanni De AngelisGiulio
Mirella Pamphili(credit only)- John SunDr. Chang
- Antonio HoChinese Secret Agent
- John ChenChinese Secret Agent
Pietro FrancisciHimself (sem créditos)
Renato MontalbanoThe Doctor at the casualty department (sem créditos)
Gianni SolaroThe Director of the Research Institute (sem créditos)