Created by Brendon Small, the animated one-hour special "Metalocalypse: The Doomstar Requiem A Klok Opera" airs Sunday, October 27 at midnight (ET/PT) on Adult Swim. This once-in-a-lifetime DETHKLOK experience includes special guests Jack Black, Mark Hamill, Malcolm McDowell, and CANNIBAL CORPSE's George "Corpsegrinder" Fisher.

In "Metalocalypse: The Doomstar Requiem A Klok Opera", we pick up directly after the abduction of DETHKLOK guitarist Toki Wartooth in the season four finale. With his life in danger, his only salvation can come from the four most selfish human celebrities on Earth — his bandmates, extreme metal band DETHKLOK. Will they be able to get past their own egos to help someone besides themselves? Find out in this one-hour heavy metal rock opera special with a completely original score.

The original score from "Metalocalypse: The Doomstar Requiem A Klok Opera" will be released as a full-length album on October 29. And this isn’t just your average metal record — this is a full-blown musical featuring a fifty-piece orchestra. This full-length album features the bonus DETHKLOK single "Blazing Star" and orchestral movements (produced by Brendon Small and Emmy-winning composer Bear McCreary ("Battlestar Galactica", "Walking Dead"). Also included with the album will be a bonus "making-of" featurette with executive producer/creator/writer/musician Brendon Small and cast/musicians.

Legendary powerhouse metal drummer Gene Hoglan returns to join Brendon and DETHKLOK. Other musicians include bassist Bryan Beller (DETHKLOK, THE ARISTOCRATS, Joe Satriani), and Mike Keneally (DETHKLOK, Frank Zappa, Joe Satriani).

"Metalocalypse: The Doomstar Requiem A Klok Opera" soundtrack track listing:

01. The Birth/ Fata Sidus Oritur / One of Us Must Die

02. Magnus and the Assassin

03. Partying around the World

04. Tracking/ Ishnifus and the Challenge

05. How Can I Be a Hero?

06. The Fans are Chatting

07. Abigail's Lullaby

08. Some Time Ago…

09. The Duel

10. I Believe

11. A Traitor Amongst Them

12. Training/ Do it All for My Brother

13. The Answer is in Your Past

14. The Depths of Humanity

15. Givin' Back to You

16. En Antris et Stella Fatum Cruenti

17. The Crossroads

18. Morte Lumina

19. Blazing Star

20. The DOOMSTAR Orchestra

Says Small: "This is not like anything we've ever done. This is a full-blown musical — metal combined with symphonic passages, classic musical theatre, high-stakes drama, emotional moments, and yes, totally ridiculous comedy.

"I drew from all of my influences to make this the most unique project I could dream of.

"This is easily the best thing we've ever done with the show and the music. I can't wait for you to hear it."

States McCreary: "I have been a fan of 'Metalocalypse' for many years, and I am fortunate to call Brendon Small my friend. 'Metalocalypse: The Doomstar Requiem A Klok Opera' provided us the opportunity to collaborate that we'd always been looking for.

"I had a blast helping Brendon realize his vision for a fully-produced orchestral score to accompany his drop-tuned guitars and pounding double kicks. This opera takes his catchy songwriting to a whole new level, and I was thrilled to help out."