After a surfer dies off Morro Bay, California on Christmas Eve, shark attack investigators Ralph Collier and Brandon McMillan use forensic evidence and eyewitness accounts to ID the suspected killer: an 18-foot great white.

Reports of two legendary, very large great hammerheads - Big Moe in the Florida Keys and Sunken in Andros, Bahamas - have Dr. Tristan Guttridge and Andy Casagrande wondering if there is a clan of monster hammerheads who share the same DNA.

The Impractical Jokers are the kings of hijinx and fearlessness in the face of public humiliation but see what happens when they set out to dispel the myth that sharks are man-eating beasts the only way they know how – with extreme, mortifying challenges and dares.