Cast

Martin Landau

Commander John Koenig

Barbara Bain

Doctor Helena Russell

Barry Morse

Professor Victor Bergman

Nick Tate

Captain Alan Carter

Prentis Hancock

Paul Morrow

Zienia Merton

Sandra Benes

Roy Dotrice

Commissioner Gerald Simmons

Anthony Valentine

Male Alien

Isla Blair

Female Alien

Philip Madoc

Commander Anton Gorski

Crew

Sylvia Anderson

Producer (Production)

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Brian Johnson

Special Effects (Crew)

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Lee H. Katzin

Director (Directing)

Charles Crichton

Director (Directing)

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George Bellak

Screenplay (Writing)

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Christopher Penfold

Screenplay (Writing)

Gerry Anderson

Executive Producer (Production)

David Lane

Supervising Editor (Editing)

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Ron Fry

Production Manager (Production)