Presented in Supercolorisation

David Graham

Dr. Horatio Beaker / Mitch the Monkey / Morse Operator (voice) / Professor Matthew Matic / Lieutenant Ninety / Freighter A14 (voice) / Professor Matthew Matic / Lieutenant Ninety / Zoonie the Lazoon / Zodan / Warrior Countdown (voice) / Professor Mattew 'Matt' Matic / Lieutenant Ninety / Zoonie the Lazoon / Doctor Baker (voice) / Dr. Horatio Beaker / Mitch the Monkey / Herman Gredenski (voice) / Grandpa Ebenezer Twink / Hank (voice)

6 eps.

Sylvia Anderson

Doctor Venus / Eleanor Zero / Jonathan Zero (voice) / Doctor Venus (voice) / Jimmy Gibson (voice) (uncredited) / Jimmy Gibson / Miss Chevenitch (voice) (uncredited) / Dcotor Venus (voice)

5 eps.

Paul Maxwell

Colonel Steve Zodiac / Mrs Doughty (voice) / Colonel Steve Zodiac (voice)

3 eps.

Gerry Anderson

Robert the Robot / Granatoid 1 (voice) (uncredited) / Robert the Robot (voice) (uncredited)

3 eps.

John Bluthal

Commander Wilbur Zero / Jock Campbell (voice) / Commander Wilbur Zero / Doctor Simpson (voice) / Commander Wilbur Zero / Kazak (voice)

3 eps.

Graydon Gould

Mike Mercury / Film Narrator (voice) / Mike Mercury / Jason Munroe III (voice)

2 eps.

George Murcell

Professor Rudolph Popkiss / Black Morgan (voice) / Professor Rudolph Popkiss (voice) (credit only)

2 eps.

Nicholas Parsons

Sheriff Tex Tucker / Telegraph Operator Dan Morse (voice)

1 ep.

Kenneth Connor

Dusty the Dog / Rocky the Horse / Foreman (voice)

1 ep.

Denise Bryer

Martha 'Ma' Jones (voice)

1 ep.

Michael Holliday

Sheriff Tex Tucker (singing voice) (uncredited)

1 ep.