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Gino Bramieri as Leo Bottini |
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Cristina Gaïoni as Kitty |
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Hélène Chanel as Jacqueline |
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Mara Berni as Amalia |
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Franco Franchi as Fantuzzo |
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Ciccio Ingrassia as Rocco |
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Raimondo Vianello as Gerardo, il direttore |
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Martin Benson as Prof. Otto Kreutz |
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Margaret Lee as Sonia, la Bionda |
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Janine Hendy as Zazà |
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Peter Dane as X-9 |
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Elisabetta Velinska as infermiera |
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Fanfulla as spia che tatua la formula su Leo |
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Tullio Altamura as scienziato |
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Jole Mauro as proprietaria della Pensione |
| Directing | Giorgio Simonelli | Director |
| Writing | Pipolo | Story |
| Camera | Sergio Bergamini | Camera Operator |
| Sound | Raffaele Del Monte | Sound |
| Directing | Nick Nostro | First Assistant Director |
| Art | Antonio Visone | Production Design |
| Production | Marcello Papaleo | Unit Manager |
| Costume & Make-Up | Gustavo Sisi | Hairstylist |
| Directing | Franca Trombetti | Script Supervisor |
| Editing | Dolores Tamburini | Editor |
| Production | Giovanni A. Giurgola | Production Manager |
| Camera | Aldo Giordani | Director of Photography |
| Art | Antonio Visone | Set Decoration |
| Production | Gino Mordini | Producer |
| Production | Aldo U. Passalacqua | Unit Manager |
| Sound | Pietro Ortolani | Sound |
| Costume & Make-Up | Rosalba Menichelli | Costume Design |
| Costume & Make-Up | Duilio Giustini | Makeup Artist |
| Writing | Castellano | Story |
| Camera | Osvaldo Civirani | Still Photographer |
| Sound | Coriolano Gori | Original Music Composer |
| Writing | Pipolo | Screenplay |
| Writing | Castellano | Screenplay |
