When an underwater ocean lab is lost in a earthquake, an advanced submarine is sent down to find it and encounters terrible danger.
Cmdr. Adrian Blake
Dr. Samuel Andrews
Chief Diver Don MacKay
Dr. Leah Jansen
Diver Bob Cousins
Capt. Williams
Dr. Hal Hamilton
Diver Dave Moulton
Brigs, Triton Radioman
Diver Phil Bradley
Dr. Norton Shepherd
Warrant Officer
Dobson
Diver Stephens
Diver Thomas
Hawkes
Sub Captain
Kay, lab technician
Lt. Hobbs, Halifax day officer
Radio Officer
