A Dethklok special called “Metalocalypse: The Doomstar Requiem A Klok Opera” will air on Adult Swim on October 27.

The special’s score will be released as a full-length album shortly after on October 29 and boasts a 50-piece orchestra.

A teaser for the special is available at the end of this post.

The special will boast cameos by Cannibal Corpse‘s human log George “Corpsegrinder” Fisher, Jack Black, Mark Hamill and Malcolm McDowell.

The score itself was composed by Dethklok mastermind Brendon Small and composer Bear McCreary (“Walking Dead”).

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.”

Entertainment Dethklok Special Announced