Captain Jacques-Yves Cousteau was an oceanographer, filmmaker and explorer who made the seas a subject of fascination for millions.

During his time in the French Navy, Cousteau co-invented the Aqua-Lung: the first self-contained kit that allowed a diver to breathe underwater. This and his fascination with capturing images of the subaquatic world paved the way for a career filming the first underwater documentaries.

Travelling the seas with his trusty crew on their boat, the Calypso, Captain Cousteau in his trademark knitted red cap became a household name; thanks to shows including his TV series ‘The Undersea World of Jacques Cousteau’. He came across as a charming and eloquent showman - but his life wasn't without its tragedies and controversies...

Nominating Cousteau is wildlife cameraman and and trained biologist Doug Allan, whose career filming animals, primarily in polar regions and underwater, was hugely inspired by the Frenchman. Doug says: "There's a mischievousness about him that he carried thorugh his whole life... I think he was just a really powerful, charismatic character."

The presenter is Matthew Parris and the producer for BBC Studios Audio is Lucy Taylor.