Christine Cavanaugh

Dexter (voice)

Kat Cressida

Dee Dee (voice)

Jeff Bennett

Dad (voice)

Kath Soucie

Mom (voice)

Allison Moore

Dee Dee (voice)

Tyler Samuel Lee

Narrator / Dexter / Mandark (voice)

Candi Milo

Dexter (voice)

Randy Poffo

Rasslor (voice)

Dom DeLuise

Koosalagoopagoop (voice)

Paul Williams

Professor Williams (voice)

Agostino Castagnola

Doctor / Narrator (voice)

Martin Mull

M.A.R. 10 (voice)

Fred Willard

F.R.E.D. (voice)

Mark Hamill

Magic Uncle Fergel O'Reilly (voice)

Michael Dorn

Robo Dexo 3000 (voice)

Andy Suriano

Andy Suriano (voice)

Brad Garrett

Magmanamus / Man #1 / Driver (voice)

Paula Tiso

Honeydrew (voice)

Robert Ridgely

Commander (voice)

John Kassir

Guy #2 / Guy #3 / Kid #2 (voice)

Ed Gilbert

Huntor / Space Hick #2 (voice)

Jorge Galvan

Doctor Diablos (voice)

Eddie Deezen

Mandark / Olga (voice)

Jim Cummings

Red-Eye (voice)

Michael Pataki

Warden (voice)

Michael Conner

Magician (voice)

Jeff Coopwood

Announcer / Man #1 / Big Daddy (voice)

Jennifer Hale

Girl / Lil Girl #3 (voice)

Don Shelton

Left Clerk / Geek Singer (voice)

Maurice LaMarche

Alien #2 (voice)

Randy Crenshaw

Right Clerk / Geek Singer (voice)

Roger Freeland

Barbershop Singer (voice)

John Garry

Action Hank (voice)

Gary Owens

TV Announcer (voice)

Steve Lively

Barbershop Singer (voice)

Earl Boen

General (voice)

Rob Paulsen

Spork / Large Dealer / Checker #1 (voice)

DeeDee Rescher

Peltra (voice)

Frank Welker

Monster (voice)

Kevin Michael Richardson

Action Hank / Cop (voice)

Tom Kenny

Ahab / Greenpeas / Whale Chorus (voice)

Kimberly Brooks

Gwen (voice)

James Hong

RA (voice)

Gail G. Hiller Lee

Narrator's Mom (voice)

Greg Eagles

Capital 'G' / Man #1 (voice)

Brian Tochi

Toshi / Japanese Dad / Japanese Boy #1 / Japanese Boy #2 (voice)

Dee Bradley Baker

Store Owner (voice)

Grey DeLisle

Waitress #1 / Waitress #2 (voice)

Lauren Tom

Teacher (voice)

Melissa Disney

Cheerleader / Girl #2 / Girl #5 (voice)

Pamela Adlon

Brother (voice)

Dave Coulier

Coach (voice)

Hamilton Camp

Principal (voice)

Rachael MacFarlane

Miss Salinger / Cheerleader / Girl (voice)

Jess Harnell

Boy Band Germ #2 / Boy Band Germ #4 / Boy Band Germ #5 (voice)

Jay Huguley

Hokochoo (voice)

Daran Norris

Client / Photographer #1 / Dude #1 (voice)

Jennifer Martin

Sexy Computer (voice)

Mindy Cohn

Librarian (voice)

Corey Burton

Narrator / Martian / Super-Monkey (voice)