Cast

William Hopper

Colonel Robert Calder

Joan Taylor

Marisa Leonardo

Frank Puglia

Dr. Leonardo

John Zaremba

Dr. Judson

Thomas Browne Henry

Maj. Gen. A.D. McIntosh

Tito Vuolo

Commissario Unte

Jan Arvan

Signore Contino - Government Official

Arthur Space

Dr. Sharman

Bart Braverman

Pepe

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Don Orlando

Fisherman Mondello (uncredited)

Crew

Nathan Juran

Director (Directing)

Charles H. Schneer

Producer (Production)

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Robert Creighton Williams

Screenplay (Writing)

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Lawrence W. Butler

Special Effects (Crew)

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Mischa Bakaleinikoff

Original Music Composer (Sound)

Christopher Knopf

Screenplay (Writing)

Ray Harryhausen

Visual Effects (Visual Effects)

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Robert Priestley

Set Decoration (Art)

Charlotte Knight

Story (Writing)

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Cary Odell

Art Direction (Art)