Finding Your Roots is a ten-part Public Broadcasting Service (PBS) public television series hosted by Professor Henry Louis Gates. The series originally aired March 25 – May 20, 2012 from 8–9 p.m. EDT. 　　The series uses traditional genealogical research and genetics to find the family history of 25 Americans. Genetic techniques include Y-chromosome DNA, mitochondrial DNA, and autosomal DNA analyses to infer both ancient and recent genetic relationships. 　　Branford Marsalis and Harry Connick, Jr. (aired March 25, 2012) 　　John Lewis and Cory Booker (aired March 25, 2012) 　　Barbara Walters and Geoffrey Canada (aired April 1, 2012) 　　Kyra Sedgwick and Kevin Bacon (aired April 8, 2012) 　　Angela Warnick Buchdahl, Yasir Qadhi, and Rick Warren (aired April 15, 2012) 　　Maggie Gyllenhaal and Robert Downey, Jr. (aired April 22, 2012) 　　Samuel L. Jackson, Condoleezza Rice and Ruth Simmons (aired April 29, 2012) 　　Sanjay Gupta, Margaret Cho and Martha Stewart (aired May 6, 2012) 　　John Legend, Wanda Sykes and Margarett Cooper (aired May 13, 2012) 　　Michelle Rodriguez, Adrian Grenier and Linda Chavez (aired May 20, 2012)