The Monster That Challenged the World

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

David Duncan

Story

Arnold Laven

Director

Jules V. Levy

Producer

Arthur Gardner

Producer

Lester White

Director of Photography

John Faure

Editor

Heinz Roemheld

Original Music Composer

Pat Fielder

Screenplay