Dethklok is a fictional melodic death metal band featured in the Adult Swim animated television series Metalocalypse, known for its satirical or parodic lyrical themes.
The first official Dethklok album was released on September 25, 2007, entitled The Dethalbum. The album debuted at number 21 on Billboard magazine's Top 200 list. The band released Dethalbum II on September 29, 2009, and toured with Mastodon, High on Fire, and Converge. The band's third album, Dethalbum III, was released on October 16, 2012. The soundtrack to the special episode Metalocalypse: The Doomstar Requiem was released on October 29, 2013.
A real band was set up in order to perform the band's music in live shows. Both bands were created by Brendon Small and Tommy Blacha. The music heard on Metalocalypse is performed by Brendon Small, with others needed for live concerts and albums. On August 25, 2017, Brendon Small released his second solo album, Brendon Small's Galaktikon II, which is considered to serve as "a new Dethklok album", due to Adult Swim holding the rights to the band name. However, after a five-year absence, the band returned to perform at Adult Swim Festival 2019.