Released on March 3, 1986, "Master of Puppets" is the third studio album by American heavy metal band Metallica. The album was produced by Flemming Rasmussen and Metallica, and marks a significant turning point in the band's career. Regarded by many as one of the greatest heavy metal albums of all time, "Master of Puppets" showcases the band's technical proficiency, musical maturity, and lyrical depth.