Trailer
Cast
Joe Dante
Scuba Diver #2 (uncredited)
John Sayles
Army Sentry (uncredited)
Barbara Steele
Dr. Mengers
Bruce Gordon
Colonel Waxman
Barry Brown
Trooper
Heather Menzies
Maggie McKeown
Keenan Wynn
Jack
Kevin McCarthy
Dr. Robert Hoak
Melody Thomas Scott
Laura Dickinson
Richard Deacon
Earl Lyon
Guich Koock
TV Pitchman
Belinda Balaski
Betsy
Paul Bartel
Mr. Dumont
Bruce Paul Barbour
Man in Boat
Eric Braeden
Dr. Robert Hoak (swimming double) (uncredited)
Bradford Dillman
Paul Grogan
Amy Holden Jones
Hertz Clerk (uncredited)
Phil Tippett
Scuba Diver (uncredited)
Dick Miller
Buck Gardner