Sylvia Anderson

Lady Penelope Creighton-Ward / Elaine Wickfen / Cynthia (voice)

David Graham

Gordon Tracy / Parker / Beefeater / Newspaper Vendor (voice)

Peter Dyneley

Jeff Tracy / Mr. Charles (voice)

Ray Barrett

Dawkins (voice)

Shane Rimmer

Scott Tracy (voice)

David Holliday

Virgil Tracy (voice)

Stephen La Rivière

NTBS Reporter (voice) (uncredited)

Justin T. Lee

Scott Tracy (voice) (uncredited)