Joe Alaskey
Duck Dodgers / The Martian Commander (voice)

Bob Bergen
The Eager Young Space Cadet (voice)

Richard McGonagle
Dr. I.Q. Hi (voice)

Tia Carrere
The Martian Queen (voice)

Michael Dorn
Centurion Robot (voice)

Jeff Bennett
Ambassador Porkwellington / Narrator (voice) / Goozer (voice) / Crowd Member (vo...

John DiMaggio
Kilowog (voice) / Long John Silver the 23rd (voice) / Long John Silver / The Cru...

John O'Hurley
Captain Star Johnson (voice) / Star Johnson (voice)

Mako
Happy Cat (voice) / Happy Cat / Ah-Choo (voice)

Dee Bradley Baker
Attack Droids (voice) / Captain Richards / Giant Space Monkey (voice)

Henry Winkler
Dr. Maniac (voice)

Dave Mustaine
Himself (voice)

Grey DeLisle
Computer (voice) / Catapoid (voice)

Maurice LaMarche
K'chutha Sa'am / Seaman (voice) / K'chutha Sa'am (voice)

Jim Cummings
Tazmanian Devil / Father (voice) / Tasmanian Devil / The Black Eel (voice)

Kevin Michael Richardson
Agent Roboto (voice) / Agent Roboto / Nasty Canasta (voice)

Vanessa Marshall
The New Cadet (voice) / Waitress / Woman #2 / Woman #3 (voice)

Grey Griffin
Massage Girl (voice) (as Grey DeLisle) / Food Synthesizer (voice)

Billy West
The Mother Fudd / Zeke / Martian Commander (voice) / The Fudd (voice)

Tom Kane
Walter Carbonite / Cooter / Crewmember (voice) / The President of Outer Space (v...