Cast 31

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 29

David Duncan

Writing

Arnold Laven

Directing

Heinz Roemheld

Sound

Virginia Mazzuca

Production

Joel Moss

Sound

Charles Althouse

Sound

Arthur Gardner

Production

Pat Fielder

Writing

Kerwin Coughlin

Production

Augie Lohman

Crew

Lester White

Camera

James Dowell Vance

Art

Jules V. Levy

Production

John Faure

Editing

Heinz Roemheld

Sound

Rudy Butler

Art

Paul Stader

Directing

Olga Collings

Costume & Make-Up

Ted Haworth

Crew

Allen Sloane

Costume & Make-Up

Norman Bishop

Crew

Robert H. Crandall

Crew

Scotty Welbourne

Camera

Abe Haberman

Costume & Make-Up

Heinz Roemheld

Sound

Charles Althouse

Sound

Maurice Vaccarino

Directing

Paul Eagler

Camera

B. F. Remmington

Sound