
84 minutes
6/14/1957
Giants Mollusks are released from the earth by an earthquake and start killing people.

Tim Holt
as Lt. Cmdr. John 'Twill' Twillinger

Audrey Dalton
as Gail MacKenzie

Hans Conried
as Dr. Jess Rogers

Barbara Darrow
as Jody Simms

Max Showalter
as Dr. Tad Johns

Harlan Warde
as Lt. Robert 'Clem' Clemens

Gordon Jones
as Sheriff Josh Peters

Mimi Gibson
as Sandy MacKenzie
Marjorie Stapp
as Connie Blake

Jody McCrea
as Seaman Fred Johnson

Wallace Earl
as Sally
Dennis McCarthy
as George Blake (lab assistant)

Sarah Selby
as Mrs. Simms

Milton Parsons
as Lewis Clark Dobbs

Charles Tannen
as Seaman Wyatt (Radioman)
Robert Benevides
as Seaman Morty Beatty
John Carlyle
as Monster Victim
John Close
as Deputy Larry

William Forrest
as Admiral Greenhouse
Gil Frye
as Deputy Scotty

Joseph Hamilton
as Other Lock Watchman

Charles Herbert
as Boy with Morty's Cap
Byron Kane
as Coroner Nate Brown
Ralph Littlefield
as Gatekeeper

David McMahon
as Patterson

Ralph Moody
as Watchman at Lock 57

William Swan
as Seaman Howard Sanders

Hal Taggart
as Davis - Resort Owner

Mack Williams
as Captain Masters
Dan Gachman
as Deputy Brewer
Michael Dugan
as Clarke