Sherman

Producer

Professor Sheldon 'Shelly' Oberon

Bowser (voice)

Doug McCallister

Vocals / Guitar / Sax-a-boom

Himself (Archive footage)

Steve

Satan

Claptrap (voice)

Po (voice)

Self (1 episode)

Self (1 episode)

Po (voice)

Associate Producer

Self (1 episode)

Bowser (voice)

Songs

Captain Bombardier (1 episode)

Joseph Stalin (2 episodes)

Self (2 episodes)

(Special Appearance)

Self - Contestant (1 episode)

Lithdor (voice) (1 episode)

Wolfman Jack

Po (voice) (42 episodes)

Executive Producer (42 episodes)

Grown Up Stan (voice)

Brad Gunter (voice) (1 episode)

Man

Self (1 episode)

Producer

Songs

Westley (1 episode)

Self

Self (1 episode)

Self (1 episode)

Self (2 episodes)

Self - Guest (2 episodes)

Professor Sheldon 'Shelly' Oberon

Self - Presenter (1 episode)

Self (1 episode)

Sheriff

Self (4 episodes)

Self (1 episode)

R.L. Stine (uncredited)

Self (1 episode)

Jonathan Barnavelt

Self - Special Guest (1 episode)

Po (Voice)

Self (1 episode)

Dexter

Self (3 episodes)

Professor Sheldon 'Shelly' Oberon

Self - Judge (1 episode)

Big Tommy

Self - Presenter (1 episode)

Jan Lewan

Self (1 episode)

Self (1 episode)

Self (1 episode)

Ludwig van Beethoven (1 episode)

Self (1 episode)

Po (voice)

Po (voice)

Self (1 episode)

Self (1 episode)

Jamison Friend (1 episode)

R.L. Stine

Dan Ringley (1 episode)

Alex Talbot (10 episodes)

Producer (10 episodes)

Self (1 episode)

Dan Landsman

Producer

Self - Guest (1 episode)

Pritchard (1 episode)

Self

(1 episode)

YouPorn Owner (uncredited)

Self (1 episode)

Dethklok's Original Manager / Fat Fan (voice)

Executive Producer (12 episodes)

William Mulholland (1 episode)

Vincenzo Peruggia (1 episode)

Elvis Presley (1 episode)

Self (1 episode)

Self (2 episodes)

JB

Writer

Bernie Tiede

Po (voice)

Jack Black (uncredited)

Brad Harris

Self

Po (voice)

MCA (B-Boys 2)

Lemuel Gulliver

Executive Producer

Self (3 episodes)

Self (4 episodes)

(1 episode)

Po (voice)

Aspartamay (2 episodes)

Buddy (1 episode)

Self (1 episode)

Zed

Sam (1 episode)

The Mayor (1 episode)

Po (voice)

Jeff Portnoy

Jeff Portnoy

Self (1 episode)

Po (voice)

Jerry

Paul McCartney (uncredited)

Milo (voice) (1 episode)

Malcolm

Self (1 episode)

(1 episode)

Self / Cop / Story Wizard (1 episode)

Executive Producer (8 episodes)

Creator

(1 episode)

Dan Harmon (2 episodes)

Executive Producer (3 episodes)

Creator

Miles Dumont

JB

Producer

Songs

Writer

JB

Music

Self - Host (1 episode)

Nacho

Producer

Self (1 episode)

Self - Emmys Segment (1 episode)

(6 episodes)

(1 episode)

Self (2 episodes)

Self

Host (3 episodes)

Self - Honoree (1 episode)

JB

George Washington

Carl Denham

(1 episode)

Lenny (voice)

Trapper JB (voice) (1 episode)

Self

Lenny (voice)

Motorcyclist

Nick Vanderpark

The Elegant Hunter (2 episodes)

(1 episode)

Self - Host (1 episode)

Self (1 episode)

Self (1 episode)

(1 episode)

Computerman (1 episode)

Mental Patient (uncredited)

Dr. Isaac Hershberg (1 episode)

Self (2 episodes)

Dewey Finn

Self - Guest (3 episodes)

Computerman (6 episodes)

Pusher / Larry Hardcore (voice) (1 episode)

Lewis (voice)

Self (1 episode)

JB

Writer

Self (6 episodes)

(1 episode)

Self (1 episode)

Self (1 episode)

J.D (1 episode)

JB

Writer

Zeke (voice)

Self (1 episode)

Lead Chimney Sweep

Lance Brumder

(1 episode)

Hal Larson

JB

Writer

J.D. McNugent

Georgie

Barry Judd

Sid

Fisherman

Jack Austin

Jack Austin (1 episode)

Fiedler

Titus Telesco (uncredited)

Self - Host (4 episodes)

Self - Musical Guest (1 episode)

Self - Cameo (uncredited) (1 episode)

Devlin

Jerry

Jack 'JB' Black (6 episodes)

Producer (6 episodes)

Writer (1 episode)

Creator

Ian Lamont

Billy Glenn Norris

self (1 episode)

Broadcast Technician

Rick

Steve

Tenacious D

Craig Poncelet

Randy (2 episodes)

Expert (1 episode)

Farmer / Satan / God (1 episode)

Gay Guy / Moviegoer (1 episode)

Jeepers Creepers (1 episode)

Monte (1 episode)

Curtis Williams (2 episodes)

Bart 'Zero' Liquori (1 episode)

Pilot

Man (1 episode)

DJ at Party

Tommy (1 episode)

Slip

Marty Prago

Private

Doug (1 episode)

Kevin Wilkins (1 episode)

Wasteland Scrap

Augie

Car Thief

Skinhead (1 episode)

Cab Driver (1 episode)

Ray (1 episode)

Roger Davis

Rick

Nick (1 episode)

Chuck (1 episode)