When a mysterious creature violently kills a man in a Maine lake, Jack Wells (Bill Pullman), the local game warden, looks into the bizarre case, along with Sheriff Hank Keough (Brendan Gleeson) and visiting paleontologist Kelly Scott (Bridget Fonda). Looking for clues in a tooth that the beast left behind, Kelly and the others eventually locate the monster, a massive and vicious reptile eager to devour anything in its path. Can the crocodile-like creature be stopped? Guest: Tonia Malito, the Dealer for the People.
On an island research facility, Dr. Susan McAlester (Saffron Burrows) is harvesting the brain tissue of DNA-altered sharks as a possible cure for Alzheimer's disease. When the facility's backers send an executive (Samuel L. Jackson) to investigate the experiments, a routine procedure goes awry and a shark starts attacking the researchers. Now, with sharks outnumbering their human captors, McAlester and her team must figure out a way to stop them from escaping to the ocean and breeding. Guest: Mr. Catch.