Rebecca Skloot
Henrietta Lacks
Deborah Lacks
Country Girl Mae
Aunt Ethel
Cousin Josh
Day Lacks
Cousin Fred
Mrs. Hsu
Mary Kubicek
Lawrence (16 yrs.)
Young Woman
Young Gladys
Carl the Mechanic
Deborah (15-24YRS)
Sadie
Johns Hopkins Student
Mrs. Gey
Doctor
Young Sonny Lacks
Woman at Pump
Johns Hopkins Nurse
Chris the Intern
Scientist
Young Joe
Alfred
Henrietta Lacks Neighbor
Johns Hopkins Student
Young Boy
Rebecca's Co-worker
Reporter
Davon Lacks
Elsie Lacks
Young Sonny
Scientist
Sir Lord Keenan Coefield
Dr. George Gey
First Administrator
Church Patron
Charlie
Zakariyyah
Christoph Lengauer
Scientist (uncredited)