In South Africa, two people are killed by great whites near the eastern cape, an area that hasn't seen an attack in decades. Scientists worry it could be the start of a series of attacks eerily similar to Black December in 1957, when six people lost their lives. Ryan Johnson, Gibbs Kuguru and Andy Casagrande head out to investigate the cause behind the spike in attacks before there's another fatality. 

The most vicious and insane populations of bull sharks from Australia and America faceoff in a no-holds-barred showdown beneath the water. Bull Shark-attack survivor Paul de Gelder contends that his Aussie sharks are the toughest, while American shark biologist Dr. Craig O'Connell attempts to find the meanest sharks Florida has to offer to take the crown.