 | Cindy Roach | ... | Herself - School Bus Driver (1 episode, 2012) |
 | Gerald Berenson | ... | Himself - Founder, Bogalusa Heart Study, Tulane University School of Medicine (1 episode, 2012) |
 | Peter Katzmarzyk | ... | Himself - Epidemiologist, Pennington Biomedical Research Center (1 episode, 2012) |
 | Stephanie Broyles | ... | Herself - Epidemiologist, Pennington Biomedical Research Center (1 episode, 2012) |
 | Kathy Pigott | ... | Herself - Teacher, Bogalusa Middle School (1 episode, 2012) |
 | Joe Culpepper | ... | Himself - Bogalusa Police Department (1 episode, 2012) |
 | Jack P. Shonkoff | ... | Himself - Director, Center on the Developing Child, Harvard University (1 episode, 2012) |
 | Thomas Frieden | ... | Himself - Director, Centers for Disease Control and Prevention (1 episode, 2012) |
 | Shiriki Kumanyika | ... | Herself - Professor of Epidemiology, Perelman School of Medicine, University of Pennsylvania (1 episode, 2012) |
 | Marlene Schwartz | ... | Herself - Deputy Director, Rudd Center for Food Policy and Obesity, Yale University (1 episode, 2012) |
 | Francis Collins | ... | Himself - Director, National Institutes of Health (1 episode, 2012) |
 | Rudy Leibel | ... | Himself - Professor of Pediatrics and Medicine, Columbia University Medical Center (1 episode, 2012) |
 | Thomas Farley | ... | Himself - Commissioner, NYC Department of Health & Mental Hygiene (1 episode, 2012) |
 | Deborah Lomax | ... | Herself - Deputy Director, Bronx District Public Health Office (1 episode, 2012) |
 | Michael Nutter | ... | Himself - Mayor of Philadelphia (1 episode, 2012) |
 | America Bracho | ... | Herself - Executive Director, Latino Health Access (1 episode, 2012) |
 | Tony Iton | ... | Himself - Senior Vice President, Healthy Communities, Tha California Endowment (1 episode, 2012) |
 | Kimberlee Wyche-Etheridge | ... | Herself - Director, Bureau of Family, Youth, and Infant Health, City of Nashville (1 episode, 2012) |
 | Karl Dean | ... | Himself - Mayor of Nashville (1 episode, 2012) |
 | Anna Busby | ... | Herself - School Health Nurse, Bogalusa Middle School (1 episode, 2012) |
 | Marsha Culpepper | ... | Herself - School Health Nurse, Bogalusa Middle School (1 episode, 2012) |
 | Raghubir Mangat | ... | Herself - Associate Professor of Clinical Pediatrics, LSU Health Sciences Center (1 episode, 2012) |
 | Donald Lloyd-Jones | ... | Himself - Chair, Preventative Medicine, Northwestern University Feinberg School of Medicine (1 episode, 2012) |
 | Jon Lomasney | ... | Himself - Director of Autopsy, Northwestern University Feinberg School of Medicine (1 episode, 2012) |
 | Roy Agee | ... | Himself - Musician (1 episode, 2012) |
 | Deborah Clegg | ... | Herself - Metabolism Investigator, University of Texas Southwestern Medical Center (1 episode, 2012) |
 | Samuel Klein | ... | Himself - Director, Center for Human Nutrition Washington University School of Medicine (1 episode, 2012) |
 | Peter Gluckman | ... | Himself - Director, Centre for Human Evolution, Adaptation, and Disease (1 episode, 2012) |
 | David Flum | ... | Himself - Surgeon, University of Washington Medical Center (1 episode, 2012) |
 | Robert Lustig | ... | Himself - Pediatric Endocrinologist, UCSF Benioff Children's Hospital (1 episode, 2012) |
 | Jennifer Ericson | ... | Herself - Weight Gain Study Participant (1 episode, 2012) |
 | Elisa Fabbrini | ... | Herself - Washington University School of Medicine (1 episode, 2012) |
 | William Dietz | ... | Himself - Director, Division of Nutrition, Physical Activity and Obesity, Centers for Disease Control and Prevention (1 episode, 2012) |
 | Eduardo Sanchez | ... | Himself - Chief Medical Officer, Blue Cross and Blue Shield of Texas (1 episode, 2012) |
 | Nora Volkow | ... | Herself - Neuroscientist, Director, National Institute on Drug Abuse (1 episode, 2012) |
 | Mary Hanley | ... | Herself - Dan's Wife (1 episode, 2012) |
 | Dan Hanley | ... | Himself - Diabetes Patient (1 episode, 2012) |
 | David Nathan | ... | Himself - Director, Diabetes Center, Massachusetts General Hospital (1 episode, 2012) |
 | Philip Marineau | ... | Himself - Former President, The Quaker Oats Company, Pepsi-Cola North America (1 episode, 2012) |