Season 1

Mark Hamill

Senator Stampingston, Mr. Selatcia (voice)

20 episodes

Victor Brandt

General Crozier, Cardinal Ravenwood (voice)

20 episodes

Brendon Small

Skwisgaar Skwigelf, Pickles the Drummer, Nathan Explosion

20 episodes

Tommy Blacha

Toki Wartooth, William Murderface (voice)

20 episodes

Brendon Small

Charles Foster Ofdensen (voice), Dick 'Magic Ears' Knubbler, Charles Foster Ofdensen (voice)

13 episodes

James Hetfield

Lorkey (voice), Troll (voice), Sniper (voice), Fan #1 (voice)

4 episodes

King Diamond

Ronald von Moldenberg (voice), Employee 421 (voice), Fast Food Restaurant Manager (voice), The Blues Devil (voice)

4 episodes

George Fisher

Angry Customer (voice), Hippie (voice), Football Player (voice), Metal Masked Assassin (voice)

4 episodes

Kirk Hammett

Barkeep (voice), Queen of Denmark (voice), Smoked Fingers fan (voice)

3 episodes

Jon Schnepp

Additional Voices (voice), Dr. Gibbits (voice)

3 episodes

Tommy Blacha

Dr. Rockso (voice)

2 episodes

Mark Hamill

Chef Jean-Pierre (voice)

2 episodes

Laraine Newman

Serveta Skwigelf, Molly, Rose Explosion (voice), News Reporter, Grandma, GMILF (voice)

2 episodes

Laura Silverman

Rebecca Nightrod (voice), Valerie Vransinn, Grishnack's Assistant (voice)

2 episodes

Jeff Loomis

Mr. Murderface (voice)

1 episode

Warrel Dane

Sammy Twinskins (voice)

1 episode

Victor Brandt

General Krosier (voice)

1 episode

Steve Smyth

Snizzy Bullets (voice)

1 episode

Andy Richter

J.F. Amarth (voice)

1 episode

Jon Schnepp

Director

12 episodes

Chris Prynoski

Director

6 episodes

Brendon Small

Director

1 episode

Tommy Blacha

Director

1 episode

Bill Braudis

Writer

20 episodes

Tommy Blacha

Writer

20 episodes

Brendon Small

Writer

19 episodes

Chris Prynoski

Writer

1 episode

Keith Crofford

Executive Producer

20 episodes

Brendon Small

Producer

20 episodes

Tommy Blacha

Executive Producer

20 episodes