Global explorer Josh Gates travels back in time and dives into the history behind some of the world's most infamous shark encounters, from the earliest known shark attack to the mystery surrounding the shark feeding frenzy faced by sailors following the sinking of the USS Indianapolis in remote waters. He also investigates the legendary "Stronsay Beast," a mysterious creature that washed ashore in Scotland in 1808, long thought to be a sea monster. But could it in fact be the remains of a massive shark?

In celebration of America's 250th anniversary, wildlife biologist Forrest Galante embarks on a nationwide quest to find the nation's most bizarre and dangerous alien sharks – from glowing swell sharks to elusive sawfish – proving the ultimate shark adventure is right here at home.

Shark attacks are extremely rare, but when they happen, the first question is always the same: what kind of shark was it? Leading shark scientists Tom "Blowfish" Hird and Rosie Moore, alongside conservationist Kinga Phillips, investigate mysterious attacks from around the world using cutting-edge forensic analysis - including bite pattern comparison, geographic profiling, video evidence, and eyewitness testimony – to identify the species responsible and uncover why these life-threatening encounters occur.