Steven Beck
Peter Weller
Dr. Glen 'Doc' Thompson
Richard Crenna
Helicopter Pilot
Larry Dolgin
Winch Operator
Pascal Druant
Steve Pelot
Lead Creature (uncredited)
Tom Woodruff Jr.
Elizabeth 'Willie' Williams
Amanda Pays
Buzz 'Sixpack' Parrish
Daniel Stern
Justin Jones
Ernie Hudson
Tony 'DeJesus' Rodero
Michael Carmine
Bridget Bowman
Lisa Eilbacher
C.P. Cobb
Hector Elizondo
Ms. Martin
Meg Foster
Russian Ship Captain
Eugene Lipinski
Original Music Composer
Jerry Goldsmith
Conductor
Story
David Webb Peoples
Screenplay
Casting
Mike Fenton
Executive Producer
Lawrence Gordon
Set Decoration
Robert Gould
Jeb Stuart
Key Hair Stylist
Aldo Signoretti
Production Design
Ron Cobb
Director of Photography
Alex Thomson
Special Effects Makeup Artist
John Rosengrant
Assistant Editor
Gillian L. Hutshing
Director
George P. Cosmatos
Producer
Aurelio De Laurentiis
Creature Design
Jon Curtis Price
Luigi De Laurentiis
Charles Gordon
Editor
John F. Burnett
Roberto Silvi
Orchestrator
Nancy Beach
Supervising Music Editor
Kenneth Hall
Arthur Morton
Music Editor
Michael Dittrick
First Assistant Editor
Richard Leeman
Negative Cutter
Aldo Manni
Costumer
Augusto Grassi
Yvonne Zarb Cousin
Underwater Camera
Ramón Bravo
Phil Barthropp
Grip
Tony Cridlin
Additional Photography
Federico Del Zoppo
Cinematography
Giuseppe Maccari
Assistant Camera
Ernesto Natoli
Electrician
Fabio Scepi
Mike Valentine
Bruce Barlow
Makeup Artist
Katalin Elek
Key Makeup Artist
Zoltan Elek
Assistant Hairstylist
Marina Marin
Second Second Assistant Director
Marco Alberti
First Assistant Director
Matt Earl Beesley
Second Assistant Director
Luca Lachin
Kuki López Rodero
David Turchi
Jane Feinberg
Lynda Gordon
Art Direction
Franco Ceraolo
Supervising Art Director
Pier Luigi Basile
David F. Klassen
William Ladd Skinner
Bruno Cesari
Costume Design
April Ferry
Post Production Supervisor
Giorgio De Vincenzo
Production Supervisor
Lucio Trentini
Set Designer
Maria Teresa Barbasso
Marco Trentini
Location Manager
Roberto Malerba
Script Supervisor
Ceri Evans
Production Coordinator
Gabriella Toro
Sound Mixer
Robin Gregory