Diretor/a
James Erskine
DIRETOR/A
David Stewart
Elenco (na ordem dos créditos)
John Cleese
Self - Presenter
Elizabeth Hurley
Self
David Attenborough
Pierce Brosnan
Candice Bergen
Michael Palin
Applicant
Prunella Scales
Pet Shop Owner
Joan Rivers
Kevyn Major Howard
Self - Photographer
Mali Finn
Self - Casting Director
Sarah Doukas
Ryan Martin
Henry de Lotbiniere
Krista Smith
Jeanne Magagna
Self - Child Psychologist
Michael Rix
Paul Ekman
Dacher Keltner
Self - Psychologist
Charles Fleming
Self - Film Writer
John Gottman
Dr. Ramachandran
Rick Edwards
Lauren Deveney
Chris Wilson
Self - Cambridge University Student
Madan Kataria
John Manning
Sybil Carrere
Mr. Kadokawa
Self - Smiling School Tutor
Roger Hargreaves
Vail Reese
Self - Dermatologist
Steve Marquardt
Self - Oral and Maxillofacial Surgeon
Ronald Zuker
Self - Surgeon
Sharon Deveney
Dan Deveney
Mandy Kolk
David M. Buss
Cynthia Breazeal
Self - Kismet Designer
Eden Kolk
Victoria Wright
Bruce Charlton
Self - Evolutionary Psychologist
David Matsumoto
Betty Ann Wong
William Goldman
Katie Lohmann
Face Model(uncredited)
Adam Leese
Various roles(uncredited)