1. 1
   

   Melt Down

   49m

   Schubert threatens to cause worldwide flooding by using powerful microwaves to melt Earth's polar ice caps, unless the government turns Mark Harris over to him.

2. 2
   

   The Mudworm

   49m

   When a multimillion-dollar underwater probe malfunctions and begins attacking any ship that travels near it, Mark must reason with its highly advanced brain and convince it to stop.

3. 3
   

   The Hawk of Mu

   48m

   Mark, investigating a power outage, discovers a centuries-old hawk statue from the legendary civilization of Mu. The statue, when used properly, can remove the power from a large area. Schubert discovers the power of the hawk statue and Mark must prevent him from taking it.

4. 4
   

   Giant

   48m

   The oceans are leaking through a fissure in the ocean floor. A con-man named Muldoon agrees to guide Mark through the fissure to investigate. However, Mark is unaware either that giants inhabit the other side of the fissure or that Muldoon has already stolen gold from one of them.

5. 5
   

   Man O' War

   48m

   Using his genetic scientists, Schubert produces a giant jellyfish which he intends to release unless his extortion demands are met.

6. 6
   

   Shoot-Out at Land's End

   48m

   Mark is somehow linked with a man named Billy, existing in a wild west town, who appears to be his twin. Investigating, Mark arrives in the town and discovers that Billy once had the same webbing as Mark, but also that he has had it removed.

7. 7
   

   Crystal Water, Sudden Death

   48m

   Schubert attempts to make a satellite weapon to knock out Earth's communications. However, to power the weapon, he needs the energy crystals protected by a force field under the ocean. The crystals actually power the force field that protects an underwater world inhabited by a humanoid society.

8. 8
   

   The Naked Montague

   48m

   An underwater landslide transports Mark to Verona, Italy...in the days of Romeo and Juliet.

9. 9
   

   C.W. Hyde

   48m

   C. W. develops a Jekyll-and-Hyde personality after swallowing a mysterious liquid.

10. 10
    

    Scavenger Hunt

    48m

    Mark re-encounters Muldoon, his nemesis from "Giant," who is using a sea monster to make island natives sacrifice young girls to him.

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