- Giancarlo Prete - Mario
- Anna Saia - Maria's friend
- Nino Vingelli - Inspector Di Giacomo
- Daniele Dublino - Entomologist
- Giuseppe Fortis - Psychiatrist
- Guerrino Crivello - Informer
- Fulvio Mingozzi - Surgeon
- Giorgio Dolfin - Policeman
- Carla Mancini - Client at beauty parlor
- Alfonso Giganti - Policeman in projection room
- Eleonora Giorgi - Maid in beauty parlor
- Ettore Mattia - La catapulta
- Eugene Walter - Ginetto, the waiter (as Walter Eugene)
- Giuliana Farnese - Mrs. Fluzzi (uncredited)
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DeWitt Sage
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