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.

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 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.

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

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.

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.