Dana Dolinoy
В роли: Self - Environmental Epigenetics and Nutrition Lab, University of Michigan School of Public Health

Marilyn Essex
В роли: Self - Director, Life Stress and Human Development Lab, University of Wisconsin-Madison

Darlene Francis
В роли: Self - Behavioral Neuroscientist, University of California, Berkeley

Michael S. Kobor
В роли: Self - Canada Research Chair in Social Epigenetics, University of British Columbia

Michael Meaney
В роли: Self - Sackler Program for Epigenetics & Psychobiology, McGill University

Marie Lynn Miranda
В роли: Self - Provost, Environmental Health Researcher, Rice University

Llewellyn M. Smith
В роли: Self - Narrator (как Llewellyn Smith)