In this unusual show Tom Allen joins the "shark doctor" and a team of researchers aboard the Betsy-M out of the port of San Pedro, California, to do research on three different shark species they mean to capture by hand. Members of the team include marine biologist Bob Johnson, shark protection researcher Jeremiah Sullivan, and Dr. Stanley Spielman the shark doctor. The divers catch an angel shark from the bottom waters near Catalina Island and a blue shark in open waters 2,000 feet deep. They catch a mako shark at night. The object of the venture is to bring these hand-caught sharks to a testing station the men have established beneath the sea where the eyes of the captured sharks can be tested with electronic equipment to determine what importance vision plays to a shark in its predatory pursuits.