• 
  Daniel Petrie

  regizor
• 
  Ian Petrie

  regizor

• 
  Ben Gazzara

  Cmdr. Adrian Blake
• 
  Ernest Borgnine

  Chief Diver Don MacKay
• 
  David Yorston

  Diver Stephens
• 
  Michael J. Reynolds

  Dr. Hal Hamilton
• 
  Stuart Gillard

  Diver Phil Bradley
• 
  Ken Pogue

  Diver Thomas

• 
  Kei Fujiwara

  Kay, lab technician
• 
  Chris Wiggins

  Capt. Williams
• 
  Leslie Carlson

  Brigs, Triton Radioman
• 
  Walter Pidgeon

  Dr. Samuel Andrews
• 
  Donnelly Rhodes

  Diver Bob Cousins
• 
  Yvette Mimieux

  Dr. Leah Jansen
• 
  Joan Gregson

  Dobson

• 
  Dan MacDonald

  Lt. Hobbs, Halifax day officer

• 
  Lalo Schifrin

  departament sunet
• 
  Stan Cole

  montaj
• 
  Christopher Tucker (I)

  make-up department
• 
  David Perlmutter

  producător
• 
  Sandy Howard

  producător
• 
  Dennis Lynton Clark

  design de producţie
• 
  Jack DeWitt

  scriitor