Sylvia Anderson

Lady Penelope Creighton-Ward (voice)

Ray Barrett

John Tracy / The Hood (voice)

Alexander Davion

Space Captain Greg Martin (voice)

Peter Dyneley

Jeff Tracy (voice)

Christine Finn

Tin-Tin Kyrano (voice)

David Graham

Gordon Tracy / Brains / Aloysius Parker (voice)

Paul Maxwell

Captain Paul Travers (voice)

Neil McCallum

Dr. Ray Pierce (voice)

Bob Monkhouse

Space Navigator Brad Newman / Swinging Star Compere (voice)

Shane Rimmer

Scott Tracy (voice)

Charles Tingwell

Dr. Tony Grant / Angry Young Man / Public Relations Officer (voice)

Jeremy Wilkin

Virgil Tracy / Space Exploration Center President (voice)

Matt Zimmerman

Alan Tracy / Messenger (voice)

F. Vivian Dunn

Himself (voice)

Cliff Richard

Cliff Richard Jr. (voice)