David Attenborough
(Self),
Adam Skolnick
(Self - Sports Journalist),
Audrey Mestre
(Self - Free Diver),
Stephen Keenan
(Self - Deceased Free Diver),
Nicholas Mevoli
(Self - Deceased Free Diver),
Peter Keenan
(Self - Father of Stephen),
Maura Keenan
(Self - Mother of Stephen),
Francesca Koe Owings
(Self - Free Diving Judge),
Lily Crespy
(Self - Free Diver),
Leigh Baker
(Self - Respiratory Therapist),
Mahmoud Barracuda
(Self - Assistant Instructor),
Kristof Coenen
(Self - Free Diver),
William Trubridge
(Self - World Record Holder),
Natalia Molchanova
(Self - Deceased Free Diver),
Alexey Molchanov
(Self - Free Diver),
Ilaria Bonin
(Self - Free Diver Italian National Team),
Homar Leuci
(Self - Free Diver Italian National Team),
Hanako Hirose
(Self - Free Diver)