Actors

Harlan (voice), Montague Jetson (voice), Mr. Tweeter (voice), Jet Screamer (voice), Boppo Crushstar / CB (voice), Nimbus the Great / George's Conscience / Willie (voice), Bus Driver (voice), Emcee (voice)

Allan Melvin

Actor

Solareenie (voice), Mr. Spendwell / Construction Worker (voice), Mangler Mars (voice), Jacob Marsley / Ghost of Christmas Present (voice)

Shepard Menken

Actor

Nimbly (voice), (voice), Mugsy Megatron / Microbe (voice)

Dick Beals

Actor

Arthur Spacely (voice), Arthur Spacely (voice) (uncredited), (voice)

John Stephenson

Actor

Gary Gammaray (voice), Dr. Scarem (voice), Commissioner / DWMR Officer (voice)

Barry Gordon

Actor

Tiny Terror / Betting Machine (voice), Mechanic (voice), Sneak (voice)

Hal Smith

Actor

(voice), Beta Ranch Manager (voice)

Joan Gardner

Actor

(voice), Helen (voice) (uncredited)

Selma Diamond

Actor

Di-Di (voice)

Frank Nelson

Actor

Ralph (voice), Robot Dance Instructor (voice)

Sonny Melendrez

Actor

Gus Guesser - Game Show Host (voice), Mr. Rocket (voice)

Brenda Vaccaro

Actor

Di-Di (voice)