Nora is een jonge toeriste die tijdens een gezellige wandeling getuige is van een gruwelijke moord. Later blijkt dat de moord de daad was van een gezochte seriemoordenaar en de politie vraagt Nora's hulp bij het oplossen van een reeks moorden die inmiddels bekend staan als de 'Alphabet Killings'.
Nee, helaas is La ragazza che sapeva troppo nog niet beschikbaar op Netflix in Nederland.
| Camera | Mario Bava | Director of Photography |
| Directing | Mario Bava | Director |
| Sound | Roberto Nicolosi | Original Music Composer |
| Writing | Ennio De Concini | Story |
| Writing | Ennio De Concini | Screenplay |
| Writing | Sergio Corbucci | Story |
| Writing | Sergio Corbucci | Screenplay |
| Writing | Eliana De Sabata | Story |
| Writing | Eliana De Sabata | Screenplay |
| Writing | Mino Guerrini | Screenplay |
| Writing | Franco Prosperi | Screenplay |
| Writing | Mario Bava | Screenplay |
| Production | Salvatore Billitteri | Associate Producer |
| Production | Massimo De Rita | Executive Producer |
| Editing | Mario Serandrei | Editor |
| Art | Giorgio Giovannini | Art Direction |
| Art | Luigi D'Andria | Set Decoration |
| Costume & Make-Up | Tina Grani | Costume Design |
| Costume & Make-Up | Mara Rocchetti | Hair Designer |
| Costume & Make-Up | Euclide Santoli | Makeup Artist |
| Production | Paolo Mercuri | Production Manager |
| Directing | Enrico Checchi | Second Assistant Director |
| Directing | Franco Prosperi | Assistant Director |
| Art | Emilio Schuberth | Set Dresser |
| Camera | Ubaldo Terzano | Camera Operator |
| Lighting | Antonio Rinaldi | Gaffer |
| Editing | Lina Caterini | Assistant Editor |
| Directing | Neda Matteucci | Script Supervisor |
| Production | Armando Govoni | Production Assistant |
