Season 4
The fourth season of the animated show Metalocalypse originally aired on Adult Swim from April 29, 2012 to July 15, 2012 with 12 episodes. The show follows virtual death metal band Dethklok. This season returned to the original 11-minute long episode format. The season four DVD/Blu-ray was released on October 30, 2012 through Adult Swim/Warner Home Video.
Episodes
1 Fanklok Apr 29, 2012 
2 Diversityklok May 6, 2012 
3 Prankklok May 13, 2012 
4 Motherklok May 20, 2012 
5 Bookklok May 27, 2012 
6 Writersklok Jun 3, 2012 
7 Dethcamp Jun 10, 2012 
8 Dethvanity Jun 17, 2012 
9 Going Downklok Jun 24, 2012 
10 Dethdinner Jul 1, 2012 
11 Breakup Klok Jul 8, 2012 
12 Church of the Black Klok Jul 15, 2012