Tim Agnello was later replaced with Gary Holt who has stayed in the band since. Kirk Hammett left in 1983 to join now-famous thrash metal band Metallica, and was eventually replaced by Rick Hunolt. Carlton Melson was eventually replaced by Rob McKillop, with Keith Stewart being replaced by Paul Baloff. With these members They released their debut album, "Bonded by Blood", on April 25, 1985, which is considered by many listeners to be the band's best album.