Mr. Schubert threatens to melt the world's icebergs and cause widespread flooding unless Mark surrenders himself voluntarily.

Mark must find a way to communicate with a semi-intelligent machine Mr. Schubert has built to mine minerals from the sea floor.

In an underwater cavern decorated with hieroglyphics, Mark finds a hawk artefact with a vial of anti-energy banded to its leg.

A fast-talking swindler (Ted Neeley) leads Mark to the gold-mining operation of an otherworldly giant (Kareem Abdul-Jabbar).

Mr. Schubert threatens to attack international swimmers with a 10-foot-long mutated jellyfish if he is not paid $1 million.

Seeking the cause of a strange pain, Mark finds himself in the Old West, facing a look-alike (Patrick Duffy in a dual role).