Death Knocks Twice [104907] Released: 1969-11-25 Genres: Drama, Thriller Revenue: unknown Cast: 19 Popularity: 0.3904 Links: : Homepage, IMDB, TMDB Synopsis : When private detective Bob Martin looking for a stolen diamond necklace, he also has a clever serial killer on the trail ... Dean ReedFabio TestiIni AssmannLeon AskinWerner PetersRiccardo GarroneMario BregaHélène ChanelFemi BenussiRenato BaldiniTeodoro CorràLanfranco CobianchTom FelleghyNadja TillerAnita EkbergAdolfo CeliMarlies PetersenBruno ArièAntonietta Fiorito