The Neptune Factor

When an underwater ocean lab is lost in a earthquake, an advanced submarine is sent down to find it and encounters terrible danger.

• 
  Daniel Petrie

• 
  Ben Gazzara
  Cmdr. Adrian Blake
• 
  Walter Pidgeon
  Dr. Samuel Andrews
• 
  Ernest Borgnine
  Chief Diver Don MacKay
• 
  Yvette Mimieux
  Dr. Leah Jansen
• 
  Donnelly Rhodes
  Diver Bob Cousins
• 
  Chris Wiggins
  Capt. Williams
• 
  Mark Walker
  Diver Dave Moulton
• 
  Leslie Carlson
  Brigs, Triton Radioman
• 
  Stuart Gillard
  Diver Phil Bradley
• 
  Michael J. Reynolds
  Dr. Hal Hamilton
• 
  Ed McGibbon
  Dr. Norton Shepherd
• 
  David Renton
  Warrant Officer
• 
  Joan Gregson
  Dobson
• 
  David Yorston
  Diver Stephens
• 
  Ken Pogue
  Diver Thomas
• 
  Dave Mann
  Hawkes
• 
  Frank Perry
  Sub Captain
• 
  Kei Fujiwara
  Kay, lab technician
• 
  Dan MacDonald
  Lt. Hobbs, Halifax day officer
• 
  Richard Whelan
  Radio Officer