Invaders from the Deep 1981

Synopsis:

When aquatic aliens plot to take over the planet, the world aquanaut security patrol are called in to battle the aliens.

Directed by: David Elliott & John Kelly & David Lane & Desmond Saunders
Written by: Alan Fennell
Release date: 1981-01-01
Runtime: 90 minutes
Cast:
Don Mason
Don Mason
Captain Troy Tempest / Solaster Leader 
Robert Easton
Robert Easton
Lieutenant George Lee 'Phones' Sheridan / Corda / WSP Commander 
Ray Barrett
Ray Barrett
Commander Sam Shore / Sub-Lieutenant John Horatio Fisher / King Titan / Gadeth / Power Plant technician / Chidora / Maritamis / Fragil 
Lois Maxwell
Lois Maxwell
Lieutenant Atlanta Shore / Milly Carson / Marineville Tracking Station #2 
David Graham
David Graham
Admiral Henry Carson / Marin / Nucella / Marineville Tracking Station #1 / Jet Squadron Leader / Turata