Salli Richardson, is an American movie and television actress. In 2007, she played the role of Zoe, the wife of Robert Neville (played by Will Smith), in the movie I Am Legend. She is best known for her starring role as Doctor Allison Blake on Eureka, a popular series on the Syfy channel. She also provided her voice for the role of Elisa Maza from the animated series Gargoyles . Her mother Marcia Harris is African American/Native American (Cherokee) and her father Duel Richardson is Caucasian (English/Italian).