Neil and the Ocean Vet team embark on a study to document the shark species that come close to Bermuda beaches at night. Locals say you shouldn't swim in the sea at night, Neil and his team set out to understand why. Watch Neil complete a series of dangerous night dives in potentially shark infested waters. Follow Neil and his team as they perform a surgical procedure to implant an acoustic tag in the abdomen of a juvenile tiger shark in a bid to reveal how often these animals return close to Bermuda’s shores at night. This mission proves to be one of the teams toughest yet, testing their nerves and stamina to its absolute limits. Narrated by Michael Douglas