Francis Matthews

as Captain Scarlet (voice)

Ed Bishop

as Captain Blue (voice)

Donald Gray

as Captain White / Captain Black / The Mysterons (voice)

Cy Grant

as Lieutenant Green (voice)

Elizabeth Morgan

as Destiny Angel (voice)

Gary Files

as Captain Magenta / Pilot (voice)

David Healy

as Lunar Controller / Frazer (voice)

Charles Tingwell

as Lieutenant Dean / Carter (voice)

Jeremy Wilkin

as Captain Ocher / Angelini / Control / Shroeder / Kurnitz / Human Captain Black (voice)

Martin King

as Orson / Speech Intelligence Decoder (S.I.D.) (voice)

Sylvia Anderson

as Linda Nolan / Receptionist (voice)

Paul Maxwell

as Captain Grey / Breck (voice)

Janna Hill

as (voice) (credit only)

Lian-Shin Yang

as (voice) (credit only)