Death Knocks Twice

When private detective Bob Martin looking for a stolen diamond necklace, he also has a clever serial killer on the trail ...

• Harald PhilippDirector
• Mario Di NardoScreenplay
• Piero UmilianiOriginal Music Composer
• Sergio GarroneScreenplay
• Harald PhilippScreenplay

• Dean ReedBob Martin
• Fabio TestiFrancesco di Villaverde
• Ini AssmannEllen Kent
• Leon AskinPeppe Mangano
• Werner PetersCharly Hollmann
• Riccardo GarroneArmando Locatelli
• Mario BregaRiccardo
• Hélène ChanelAngela
• Femi BenussiLois Simmons
• Renato BaldiniLionel Simmons
• Teodoro CorràRinaldo
• Lanfranco CobianchiCast