Yuri Lowenthal

Ben Tennyson (voice)

Ashley Johnson

Gwen Tennyson (voice)

Greg Cipes

Kevin Levin (voice)

Tim Curry

Dr. Chadwick / Knight #2 (voice)

Vicki Lewis

Serena (voice)

Kevin Conroy

Bellicus / Warrior 2 (voice)

Scott Menville

JT (voice)

Ioan Gruffudd

Devin Levin / Robot Guard (voice)

Wil Wheaton

Darkstar (voice)

John DiMaggio

Vulkanus (voice)

Alexander Polinsky

Argit (voice)

Kamali Minter

Trina / Zombie Girls (voice)

Kim Mai Guest

Lucy / Zombie Girls (voice)

Diane Delano

Edna / DNAlien #1 (voice)

Will Friedle

Ken / Shem (voice)

Rob Paulsen

Alien Pilot / Cotton Candy Vendor / Patrolman (voice)

Richard McGonagle

General Groff (voice)

Zeno Robinson

Alan (Heatblast II) (voice)

George Newbern

Frank (voice)

Barbara Bain

Verdona (voice)

Matt Levin

Cash (voice)

David McCallum

Paradox (voice)

Paul Eiding

DNAlien / Grandpa Max (voice)

Juliet Landau

Helen (voice)

Michael York

Patrick (voice)

Hakeem Kae-Kazim

Connor (voice)

Clancy Brown

Dragon / Pilot (voice)

Khary Payton

Manny (voice)

Adam Wylie

Pierce (voice)

Kevin Michael Richardson

HighBreed Commander / Forever Knight #2 / Guard (voice)

Greg Ellis

Squire (voice)

Tara Strong

Attea (voice)

James Arnold Taylor

Raff / Attendant 1 (voice)

Jeff Bennett

Azmuth/ Policeman / Kraab (voice)

J.K. Simmons

Magister Gilhil (voice)

Vyvan Pham

Julie / Waitress (voice)

Corey Padnos

Cooper (voice)

Dee Bradley Baker

Swampfire / Echo Echo / Humungousaur / DNAlien (voice)

Don McManus

Carl Tennyson (voice)

Beth Littleford

Sandra Tennyson (voice)

Robert David Hall

HighBreed Guard (voice)

Wallace Langham

Tyler / DNAlien #2 (voice)

Diedrich Bader

Simian / Lu (voice)

Dwight Schultz

Null Guardian / D'Void (Dr. Animo) (voice)

James Remar

Vilgax (voice)