Bradford DillmanPaul Grogan Heather MenziesMaggie McKeown Kevin McCarthyDr. Robert Hoak Barbara SteeleDr. Mengers Melody Thomas ScottLaura Dickinson Bruce GordonColonel Waxman Shannon CollinsSuzie Grogan Janie SquireBarbara Randolph Jack PaulesonBoy in Canoe Eric HenshawFather in Canoe Diamond FarnsworthWater-skier Bruce Paul BarbourMan in Boat Sally BondiSwimming Deb (uncredited) Eric BraedenDr. Robert Hoak (swimming double) (uncredited) Joe DanteScuba Diver #2 (uncredited) / Director / Editor Amy Holden JonesHertz Clerk (uncredited) Andrew G. La MarcaScuba Diver #1 (uncredited) John SaylesArmy Sentry (uncredited) / Screenplay Phil TippettScuba Diver (uncredited) / Creature Design Joe DanteScuba Diver #2 (uncredited) / Director / Editor John SaylesArmy Sentry (uncredited) / Screenplay Roger CormanExecutive Producer Chako Van LeeuwenCo-Producer Jeff SchechtmanExecutive Producer Hisako TsukubaCo-Producer Kerry MellinArt Direction Jamie AndersonDirector Of Photography M. Todd HenrySecond Unit Director Of Photography Vincent PrenticeSpecial Effects Makeup Artist Rob BottinSpecial Effects Makeup Artist Jack BuehlerWardrobe Assistant Charles H. EgleeAssistant Director Greg GearsAssistant Director Jeanne RosenbergScript Supervisor Dick LowrySecond Unit Director Brenda BalandaAssistant Editor Stacy RussoAssistant Editor Pino DonaggioOriginal Music Composer Joel GoldsmithLocation Sound Mixer Tony Santa CroceBoom Operator Richard AndersonSound Effects Dave YewdallSound Effects Teresa EcktonSound Effects Kendrick SweetDialogue Editor Tom JacobsonProduction Manager Harry WowchukLocation Manager Susan ArnoldCasting Director Sharron ReynoldsProduction Secretary Ashley StieglitzProduction Secretary Ed TarbuttonProduction Assistant Jeff HoffmanProduction Assistant Jim BoniProduction Assistant Robet BrownProduction Assistant Tom HammelProduction Manager Dave MortonMechanical & Creature Designer Phil TippettScuba Diver (uncredited) / Creature Design Doug BarnettMechanical & Creature Designer 
