The Venture Bros.

Doc Hammer

Dr. Girlfriend / Henchman 21 (voice)

Christopher McCulloch

Hank Venture / The Monarch (voice)

Patrick Warburton

Brock Samson (voice)

James Urbaniak

Dr. Venture (voice)

Michael Sinterniklaas

Dean Venture (voice)

Lisa Hammer

Triana Orpheus (voice)

Steven Rattazzi

Dr. Orpheus (voice)

Paul Boocock

Dr. Jonas Venture (voice) / Dr. Jonas Venture / Additional Voices (voice) / Dr. Jonas Venture / More Pirates (voice) / Dr. Jonas Venture / OCLF Leader (voice) / Fighter Pilot / O.S.I. Instructor (voice) / Highway Cop / Scared Straight Kid 1 (voice) / Jonas Venture Sr. (voice) / Jonas Venture Sr. / Additional Voices (voice) / Jonas Venture Sr. / Sandow / Samuel Clemens (voice) / Priest 1 / Jonas Venture (voice) / Sonny / Interpreter / Little Jorgé (voice) / Tigerriffic / Therapist / Prison Guard 2 (voice)

Brendon Small

Action Johnny (voice) / Agent Hauser (voice) / Hector / Swifty (voice) / Jonny Quest (voice) / Plastic Surgeon (voice) / Resistance 1 (voice) / Sgt. Hatred (voice) / Surgeon / OSI Scientist / SPHINX Agent 1 (voice) / Swifty / Hector / Crime-o-dile Henchman / White Noise (voice)

Cristin Milioti

Kate (voice) / Madison (voice) / Millinery Ghosts (voice) / Mrs. Fitzcarraldo (voice) / Mrs. Wandering Spider (voice) / Night Nurse Cindy Marie Abrams (voice) / Nurse (voice) / Receptionist / Sirena (voice)

Dana Snyder

President Breyer (voice) / The Alchemist (voice)

Bill Hader

Narrator (voice) / Professor Impossible (voice) / Professor Impossible / Alien villain (voice) / Professor Impossible / Phage (voice)

Toby Huss

General Treister (voice) / Scaramantula (voice)

Charles Parnell

Jefferson Twilight (voice) / Mandalay (voice)

H. Jon Benjamin

The Master (voice)

Stephen Colbert

Prof. Impossible (voice) / Professor Impossible (voice)

John Hodgman

Dale Hale (voice) / Snoopy / Investor 2 (voice)

Kevin Conroy

Captain Sunshine (voice)

Misha Collins

Prisoner 2 / Maestro Wave (voice)

Patton Oswalt

Wonderboy (voice)

Nathan Fillion

Brown Widow (voice)

Seth Green

Lance Hale / Mrs. Z (voice)

Steve Park

Mike Sorayama (voice)

Gillian Jacobs

Marsha Backwood (voice)

J.K. Simmons

Ben (Old Man Potter) (voice)

Peter McCulloch

Mummy / Monarch Henchman #1 / U.N. Guard / Solar-powered Car Scientist / General Manhowers (voice)

Richard Liebmann-Smith

U.N. Science Director (voice)

James Adomian

Phineas Phage / Lawyer (voice)

Mia Barron

Sally Impossible / Airport P.A. (voice)

Paget Brewster

Amber Gold / Mommy Long-Legs (voice)

Larry Murphy

Monseñor / Don Hell's Bouncer / Newscaster (voice)

T. Ryder Smith

Baron Ünderbheit / Investor 3 (voice)

Kate McKinnon

Margaret Fictel / Nikki Fictel (voice)