Filmmakers
Above the lineAL
Director
Arnold Laven
PF
Screenplay
Pat Fielder
DD
Screenplay
David Duncan
Story
LW
Cinematography
Lester White
Director of Photography
JF
Editing
John Faure
Editor
HR
Music
Heinz Roemheld
Original Music Composer
Cast
31TH
Tim Holt
Lt. Cmdr. John 'Twill' Twillinger
AD
Audrey Dalton
Gail MacKenzie
HC
Hans Conried
Dr. Jess Rogers
BD
Barbara Darrow
Jody Simms
MS
Max Showalter
Dr. Tad Johns
HW
Harlan Warde
Lt. Robert 'Clem' Clemens
GJ
Gordon Jones
Sheriff Josh Peters
MG
Mimi Gibson
Sandy MacKenzie
MS
Marjorie Stapp
Connie Blake
JM
Jody McCrea
Seaman Fred Johnson
WE
Wallace Earl
Sally
DM
Dennis McCarthy
George Blake (lab assistant)
SS
Sarah Selby
Mrs. Simms
MP
Milton Parsons
Lewis Clark Dobbs
CT
Charles Tannen
Seaman Wyatt (Radioman)
RB
Robert Benevides
Seaman Morty Beatty
JC
John Carlyle
Monster Victim
JC
John Close
Deputy Larry
WF
William Forrest
Admiral Greenhouse
GF
Gil Frye
Deputy Scotty
JH
Joseph Hamilton
Other Lock Watchman
CH
Charles Herbert
Boy with Morty's Cap
BK
Byron Kane
Coroner Nate Brown
RL
Ralph Littlefield
Gatekeeper
DM
David McMahon
Patterson
RM
Ralph Moody
Watchman at Lock 57
WS
William Swan
Seaman Howard Sanders
HT
Hal Taggart
Davis - Resort Owner
MW
Mack Williams
Captain Masters
DG
Dan Gachman
Deputy Brewer
MD
Michael Dugan
Clarke
Departments
23Production
- Kerwin CoughlinCasting
- Arthur GardnerProducer
- Jules V. LevyProducer
- Virginia MazzucaProduction Assistant
Camera
- Paul EaglerOther
- Scotty WelbourneUnderwater Director of Photography
Sound
- Heinz RoemheldConductor
- Heinz RoemheldMusic Director
- Charles AlthouseSound Mixer
- Joel MossSound Recordist
- Charles AlthouseSound Recordist
- B. F. RemmingtonSound Recordist
Art
- James Dowell VanceArt Direction
- Rudy ButlerSet Decoration
Costume & Make-Up
- Olga CollingsHairstylist
- Abe HabermanMakeup Artist
- Allen SloaneWardrobe Supervisor
Crew
- Ted HaworthOther
- Robert H. CrandallOther
- Augie LohmanSpecial Effects
- Norman BishopTechnical Supervisor
Directing
- Maurice VaccarinoAssistant Director
- Paul StaderOther