Giants Mollusks are released from the earth by an earthquake and start killing people.
Cast
Tim Holt
Lt. Cmdr. John 'Twill' Twillinger
Audrey Dalton
Gail MacKenzie
Hans Conried
Dr. Jess Rogers
Barbara Darrow
Jody Simms
Max Showalter
Dr. Tad Johns
Harlan Warde
Lt. Robert 'Clem' Clemens
Gordon Jones
Sheriff Josh Peters
Mimi Gibson
Sandy MacKenzie
Marjorie Stapp
Connie Blake
Jody McCrea
Seaman Fred Johnson
Wallace Earl
Sally
Dennis McCarthy
George Blake (lab assistant)
Sarah Selby
Mrs. Simms
Milton Parsons
Lewis Clark Dobbs
Charles Tannen
Seaman Wyatt (Radioman)
Robert Benevides
Seaman Morty Beatty
John Carlyle
Monster Victim
John Close
Deputy Larry
William Forrest
Admiral Greenhouse
Gil Frye
Deputy Scotty
Joseph Hamilton
Other Lock Watchman
Charles Herbert
Boy with Morty's Cap
Byron Kane
Coroner Nate Brown
Ralph Littlefield
Gatekeeper
David McMahon
Patterson
Ralph Moody
Watchman at Lock 57
William Swan
Seaman Howard Sanders
Hal Taggart
Davis - Resort Owner
Mack Williams
Captain Masters
Dan Gachman
Deputy Brewer
Michael Dugan
Clarke
Crew
Arnold Laven
Director
Pat Fielder
Screenplay
David Duncan
Story
John Faure
Editor
Lester White
Director of Photography
Scotty Welbourne
Underwater Director of Photography
Maurice Vaccarino
Assistant Director
Jules V. Levy
Producer
Arthur Gardner
Producer
Virginia Mazzuca
Production Assistant
Kerwin Coughlin
Casting
Allen Sloane
Wardrobe Supervisor
Olga Collings
Hairstylist
Abe Haberman
Makeup Artist
Charles Althouse
Sound Mixer, Sound Recordist
Joel Moss
Sound Recordist
B. F. Remmington
Sound Recordist
Augie Lohman
Special Effects
Heinz Roemheld
Original Music Composer, Music Director, Conductor
Rudy Butler
Set Decoration
Norman Bishop
Technical Supervisor
James Dowell Vance
Art Direction
Paul Stader
Other
Ted Haworth
Other
Robert H. Crandall
Other
Paul Eagler
Other
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