Ahead of the new series, the producers reveal the challenges and highlights of bringing the show to life - from celebs wading with lemon sharks to scuba training with tiger sharks.
Sir Lenny Henry, Lucy Punch, Helen George, Rachel Riley, Ade Adepitan, Dougie Poynter and Ross Noble embark on a dangerous journey to the Bahamas to swim with sharks.
The celebrities fend off circling reef sharks without the safety of a cage, Helen faces her fear of the sea, and Ade has an equipment failure while surrounded by sharks
The celebrities are cast out to sea, Lucy has a moving encounter with the endangered great hammerhead shark, and Lenny opens up to Ade about his motives for being here.
Dougie has a shocking shark encounter in a shipwreck a week before the tiger shark dive, and there is a storm at sea while the team are diving with Caribbean reef sharks.
The qualified celebrity team members come face to face with 18-foot tiger sharks and find out if they can overcome their fear and learn to love these notorious predators.
