screenshots / Beyond Atlantis / 1973 Dimension Pictures

This Filipino-American sci-fi horror film was filmed on location in the Philippines.

Working titles for the production included "Sea Creatures" and "Sea People".

Star George Nader had previously appeared in 1953's Miss Robin Crusoe, a female version of Robinson Crusoe starring Amanda Blake of Gunsmoke fame.

Actor Patrick Wayne would later star in Sinbad and the Eye of the Tiger and The People That Time Forgot, both in 1977.

Other Filipino horror films starring John Ashley include Brides of Blood (1968) and The Mad Doctor of Blood Island (1969).

Vic Diaz had previously been cast as Satan in 1971's Beast of the Yellow Night (also starring John Ashley).

Films directed by Eddie Romero include the Filipino western Cavalry Command (aka: Day of the Trumpet) in 1958 and Beast of Blood in 1971.

George Nader passed in 2002 at the age of 80.