- Country: Italy, Monaco
- Genres: Drama, Thriller
- Release: 1975-11-01
- Director: Harald Philipp
- Writers: Sergio Garrone , Harald Philipp , Max Pierre Schaeffer , Mario di Nardo
- Language: Italian
- Stars: Dean Reed , Fabio Testi , Ini Assmann , Leon Askin , Werner Peters , Riccardo Garrone , Mario Brega , Hélène Chanel , Femi Benussi , Renato Baldini
- Runtime: 90 min
- Awards: N/A
- AKA: Death Knocks Twice! (Australia) , O thanatos htypaei dyo fores (Greece) , Death Knocks Twice (United States of America) , Ölüm Kapıyı İki Kere Çalar (Turkey) , Hard Women (United States of America) , Death Knocks Twice (Canada) , Blonde Lokvogel voor een Moordenaar (Netherlands the) , La morte bussa due volte (Italy) , La mort sonne deux fois (France, French Republic) , Lokkemat for morderen (Norway) , La mort sonne toujours deux fois (France, French Republic) , Death Knocks Twice , Death Knocks Twice (United Kingdom) , Blonde Köder für den Mörder , Sta dihtya mias gynaikas (Greece) , Marq dobar dar mizanad (Iran) , The Blonde Connection (United States of America)
- Plot: While looking for a stolen diamond necklace, private investigator Bob Martin uncovers a smart serial killer.
- IMDB:tt0064096
Death Knocks Twice Cast · · · ALL
Harald Philipp
Director
Dean Reed
Bob Martin
Fabio Testi
Francesco di Villaverde
Ini Assmann
Ellen Kent
Leon Askin
Peppe Mangano
Werner Peters
Charly Hollmann
Riccardo Garrone
Armando Locatelli
Mario Brega
Riccardo
Hélène Chanel
Angela
Femi Benussi
Lois Simmons
Renato Baldini
Lionel Simmons
Teodoro Corrà
Rinaldo
Lanfranco Cobianchi
Tom Felleghy
Berry
Nadja Tiller
Maria di Villaverde
Anita Ekberg
Sophia Ferretti
Adolfo Celi
"der Professor"
Marlies Petersen
Babsie
Bruno Ariè
Charly's Henchman
Antonietta Fiorito
(credit only)