Segment "The Telephone" was the first Italian thriller to be shot in color.
This film served as inspiration for the naming of the exceptionally influential doom metal band Black Sabbath. Questioned individually, no two members of the band tell the story quite the same way. The most consistently repeated details are that Geezer Butler or Tony Iommi walked past a theatre in 1968 and saw the large crowds lining up to see this film. Black Sabbath, known as Earth at the time, were playing small clubs around Birmingham. When comparing the size of the crowds waiting in line to see this film to attendance at their shows, they came to the conclusion that music that frightens people would sell more tickets. Writing and jamming sessions eventually resulted in a song called Black Sabbath that was such a great change in direction (whilst still retaining their roots in blues, jazz, and soul) that they kept the name for the band and wrote all of their music from that point onward in a similar style.
There were additional scenes filmed with Boris Karloff introducing the segments, however AIP decided they were unnecessary and cut them from the film. Karloff would later say these introductions were some of the most fun he'd ever had on a film set.