Mario Bava
During the late 1950s , his eventual career trajectory as a director began when he was relied upon to complete projects begun by or credited to his colleague Riccardo Freda and other filmmakers , including "I Vampiri" ( 1957 ) ( the first Italian horror film of the sound era ) , "The Day the Sky Exploded" ( 1958 ) ( the first Italian science fiction film ) , "Caltiki – The Immortal Monster" ( 1959 ) and "The Giant of Marathon" ( 1959 ) . 
<triplet> I Vampiri <subj> Riccardo Freda <obj> director <triplet> Caltiki – The Immortal Monster <subj> Riccardo Freda <obj> director