Doug McClure
Greg Collinson
Peter Gilmore
Charles Aitken
Shane Rimmer
Captain Daniels
Lea Brodie
Delphine
Michael Gothard
Atmir
Hal Galili
Grogan
John Ratzenberger
Fenn
Derry Power
Jacko
Donald Bisset
Professor Aitken
Ashley Knight
Sandy
Robert Brown
Briggs
Cyd Charisse
Atsil
Searching for the lost world of Atlantis, Prof. Aitken, his son Charles and Greg Collinson are betrayed by the crew of their expedition's ship, attracted by the fabulous treasures of Atlantis. The diving bell disabled, a deep sea monster attacks the boat. They are all dragged to the bottom of the sea where they meet the inhabitants of the lost continent, an advanced alien race that makes sailors their slaves.
