Hyppo Audouy

Himself - Narrator (voice)

Stéphane Chassagne

Himself - Urologist

Martin Knight

Himself - Bioengineer

Steven Soifer

Himself - Psychologist

Sally Magnusson

Herself - Writer

Martin Lara

Himself - Urotherapist

Wu Yunhua

Himself - Therapist

Ximin Du

Himself - Urotherapist

Duaqing Pei

Himself - Researcher

Shaker Mousa

Himself - Researcher

Scott Chen

Himself - Ecological Farmer

Jes Thomsen

Himself - Greentech Director

Gerardine Botte

Herself - Researcher

Mike Jetten

Himself - Microbiologist

Thierry Berrod