When an underwater ocean lab is lost in a earthquake, an advanced submarine is sent down to find it and encounters terrible danger.
as Cmdr. Adrian Blake
as Dr. Samuel Andrews
as Chief Diver Don MacKay
as Dr. Leah Jansen
as Diver Bob Cousins
as Capt. Williams
as Diver Dave Moulton
as Brigs, Triton Radioman
as Diver Phil Bradley
as Dr. Hal Hamilton
as Anita, lab technician