Thunderbirds: Give or Take a Million

David Graham

Gordon Tracy / Brains / Kyrano / Straker / 2nd Santa (voice)

Ray Barrett

John Tracy / Scobie / Harman / Security Chief Joe (voice)

Sylvia Anderson

Lady Penelope Creighton-Ward / Nicky / Nurse Nimmo (voice)

Christine Finn

Tin-Tin Kyrano / Grandma Tracy (voice)

Charles Tingwell

Dr. Lang / Tanner (voice) (uncredited)