Christopher McCulloch

Hank Venture / The Monarch (voice)

Patrick Warburton

Brock Samson (voice)

James Urbaniak

Dr. Venture (voice)

Michael Sinterniklaas

Dean Venture (voice)

Misha Collins

Prisoner 2 / Maestro Wave (voice)

Doc Hammer

Dr. Girlfriend / Henchman 21 (voice)

Patton Oswalt

Wonderboy (voice)

H. Jon Benjamin

The Master (voice)

Nathan Fillion

Brown Widow (voice)

Stephen Colbert

Professor Impossible (voice)

Seth Green

Lance Hale / Mrs. Z (voice)

Steve Park

Mike Sorayama (voice)

Gillian Jacobs

Marsha Backwood (voice)

Kevin Conroy

Captain Sunshine (voice)

Charles Parnell

Mandalay (voice)

Lisa Hammer

Triana Orpheus (voice)

Terrence Fleming

Col. Bud Manstrong (voice)

Dana Snyder

President Breyer (voice)

Miguel Martinez-Joffre

Mexican Gangster / Mexican Student (voice)

Steven Rattazzi

Dr. Orpheus (voice)

Cristin Milioti

Sirena / Mrs. Wandering Spider (voice)

Rachel Simon

Fantasy Mom (voice)

Richard Liebmann-Smith

Mexican University Administrator (voice)

Tom Vollette

Singer (voice)

Brendon Small

Dr. Vulcano / Master Yourname (voice)

Bill Hader

Professor Impossible (voice)

Steffen Vala

College Student (voice)

T. Ryder Smith

Baron Ünderbheit / Otto Aquarius (voice)

Nina Hellman

J.J.'s Ride to the Marina (voice)

Paul Boocock

Jonas Venture Sr. / Sandow / Samuel Clemens (voice)

Mia Barron

Molotov Cocktease (voice)

Jarboe

Maid (voice)

Suzanne Gilad

Patty (voice)

Joanna Adler

Mrs. Manstrong (voice)

Stephen DeStefano

Dr. Paul Entmann (voice)

Rachel Feinstein

Barbie-Q / Barbara Qantas / Woman on Street (voice)

Reggie Watts

Delivery Guy (voice)

Toby Huss

Scaramantula (voice)

Aziz Ansari

Martin (voice)

John Hodgman

Dale Hale (voice)

Wyatt Cenac

Tommy / Mr. Blunder (voice)

Tim Meadows

Wind Song (voice)

Kate McKinnon

Thalia / Nikki Fictel / Mrs. Fictel (voice)

Paget Brewster

Amber Gold / Vespertina / Councilman 11 / Waitress (voice)

Larry Murphy

Diamond Backdraft / Man in Robe (voice)

Jeffrey Wright

Think Tank / Dr. Nidaba (voice)

Barbara Rosenblat

Battleaxe (voice)

Mark Gagliardi

Rocco (voice)

Clancy Brown

Red Death (voice)

Paul F. Tompkins

Blue Morpho / Dr. Heinie / Turnbuckle (voice)

Hal Lublin

Wide Wale / Z Henchman (voice)

James Adomian

Dr. Phineas Phage / Blackout 2 (voice)

Gary Cole

Professor Von Helping (voice)

Katie Flahive

German Woman (voice)

Rhys Darby

H.E.L.P.eR. MOD-2 (voice)

Mark Hamill

Presto Change-O / Illuminati 1 (voice)

Annie Savage

Dot Com / Receptionist (voice)