David Suzuki

Narrator, Self - Host, Self

Niobe Thompson

Self - Host, Narrator, Self

Nicky Guadagni

Narrator

Jane Goodall

Self, Self - Primatoglost

Richard Cotton

Narrator

Sandra Oh

Narrated by

Anthony Phelan

Narrator

Sarika Suzuki

Narrator, Self

Jennifer Gardy

Self - Host

Chris Hadfield

Self, Self - Astronaut & Author

Tim Spector

Self - Author of 'The Diet Myth'

Lister Sinclair

Self - Host

Erna Buffie

Narrator