"The most fantastic undersea odyssey ever filmed."
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

Diver Dave Moulton

Brigs, Triton Radioman

Diver Phil Bradley

Dr. Hal Hamilton

Anita, lab technician