The Monster That Challenged the World

Giants Mollusks are released from the earth by an earthquake and start killing people.

• Arnold LavenDirector
• Pat FielderScreenplay
• Heinz RoemheldOriginal Music Composer

• Tim HoltLt. Cmdr. John 'Twill' Twillinger
• Audrey DaltonGail MacKenzie
• Hans ConriedDr. Jess Rogers
• Barbara DarrowJody Simms
• Max ShowalterDr. Tad Johns
• Harlan WardeLt. Robert 'Clem' Clemens
• Gordon JonesSheriff Josh Peters
• Mimi GibsonSandy MacKenzie
• Marjorie StappConnie Blake
• Jody McCreaSeaman Fred Johnson
• Wallace EarlSally
• Dennis McCarthyGeorge Blake (lab assistant)