Cast
Bradford Dillman
Paul Grogan
Heather Menzies
Maggie McKeown
Kevin McCarthy
Dr. Robert Hoak
Keenan Wynn
Jack
Dick Miller
Buck Gardner
Barbara Steele
Dr. Mengers
Belinda Balaski
Betsy
Melody Thomas Scott
Laura Dickinson
Bruce Gordon
Colonel Waxman
Barry Brown
Trooper
Paul Bartel
Mr. Dumont
Shannon Collins
Suzie Grogan
Shawn Nelson
Whitney
Richard Deacon
Earl Lyon
Janie Squire
Barbara Randolph
Roger Richman
David
Bill Smillie
Jailer
Guich Koock
TV Pitchman
Jack Pauleson
Boy in Canoe
Eric Henshaw
Father in Canoe
Robert Vinson
Soldier
Virginia Dunnam
Girl
Diamond Farnsworth
Water-skier
Bruce Paul Barbour
Man in Boat
Robyn Ray
Screaming Woman
Mike Sullivan
Dam Guard
Jack Cardwell
Brandy
Sally Bondi
Swimming Deb (uncredited)
Eric Braeden
Dr. Robert Hoak (swimming double) (uncredited)
Joe Dante
Scuba Diver #2 (uncredited)
Amy Holden Jones
Hertz Clerk (uncredited)
Andrew G. La Marca
Scuba Diver #1 (uncredited)
John Sayles
Army Sentry (uncredited)
Phil Tippett
Scuba Diver (uncredited)
Crew
Joe Dante
Director
John Sayles
Screenplay
Roger Corman
Executive Producer
Jon Davison
Producer
Pino Donaggio
Original Music Composer
Joe Dante
Editor
Mark Goldblatt
Editor
Rob Bottin
Special Effects Makeup Artist
Vincent Prentice
Special Effects Makeup Artist
Jon Berg
Special Effects
Dave Morton
Mechanical & Creature Designer
Robert Short
Special Props
Chris Walas
Special Props
Phil Tippett
Creature Design
Conrad E. Palmisano
Stunt Coordinator
Chako Van Leeuwen
Co-Producer
John Sayles
Story
Jeff Schechtman
Executive Producer
Hisako Tsukuba
Co-Producer
Jamie Anderson
Director of Photography
Bill Mellin
Art Direction
Kerry Mellin
Art Direction
Jeff Ayers
Set Decoration
Richard Robinson
Story
Roger Creed
Stunts
Nick Palmisano
Stunts
Bobby Sargent
Stunts
Tom Jacobson
Production Manager
Harry Wowchuk
Location Manager
Jools Tippett
Special Effects Assistant
Jerome Seven
Special Effects Assistant
Doug Barnett
Mechanical & Creature Designer
Adam Beckett
Animation
Susan Arnold
Casting Director
Ben Haller
Key Grip
Joel Goldsmith
Location Sound Mixer
Michael Katz
Gaffer
Charles H. Eglee
Assistant Director
Greg Gears
Assistant Director
Dana Christiaansen
Assistant Camera
Andrew G. La Marca
Assistant Camera
Tony Santa Croce
Boom Operator
Kevin Hughes
Props
Kathleen Hughes
Props
Chris Brightman
Grip
Bill Decker
Grip
Tim Doughten
Assistant Art Director
Brenda Balanda
Assistant Editor
Stacy Russo
Assistant Editor
Jeanne Rosenberg
Script Supervisor
Sharron Reynolds
Production Secretary
Ashley Stieglitz
Production Secretary
Jack Buehler
Wardrobe Assistant
O. C. Perkins
Still Photographer
Ted Boehler
Still Photographer
Ed Tarbutton
Production Assistant
Jeff Hoffman
Production Assistant
Michael Martin
Production Assistant
Jim Boni
Production Assistant
Robet Brown
Production Assistant
Dick Lowry
Second Unit Director
Tom Hammel
Production Manager
M. Todd Henry
Second Unit Director of Photography
Christopher Tufty
Assistant Camera
Clyde E. Bryan
Assistant Camera
Scott Buttfield
Grip
Moshe Levin
Grip
Richard Anderson
Sound Effects
Dave Yewdall
Sound Effects
Teresa Eckton
Sound Effects
Kendrick Sweet
Dialogue Editor
Valcie Yewdall
Foley
