The Monster That Challenged the World

An earthquake in the Salton Sea unleashes a horde of prehistoric mollusk monsters that threaten naval operations and the local inhabitants.

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Tim Holt Lt. Cmdr. John "Twill" Twillinger

Audrey Dalton Gail MacKenzie

Hans Conried Dr. Jess Rogers

Harlan Warde Lt. Robert 'Clem' Clemens

Casey Adams Dr. Tad Johns

Mimi Gibson Sandy MacKenzie

Gordon Jones Sheriff Josh Peters

Marjorie Stapp Connie Blake

Dennis McCarthy George Blake

Barbara Darrow Jody Simms

Bob Beneveds Seaman Morty Beatty

Michael Dugan Clarke

Arnold Laven Director

Arthur Gardner Producer

Jules Levy Producer

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