The Walking Dead’s Sonequa Martin-Green Cast as Lead in CBS’ Star Trek: DiscoveryYesha Callahan12/15/16 1:19pm0EditPromoteShare to KinjaToggle Conversation toolsGo to permalink Actress Sonequa Martin-GreenKevork Djansezian/Getty Images Star Trek fans, rejoice! The newest CBS series has found its lead with The Walking Dead’s Sonequa Martin-Green. Martin-Green has been cast in Star Trek: Discovery, according to EW. Advertisement The series will air on CBS All Access and will make Martin-Green the first African-American woman to lead the cast of a Star Trek ensemble, which was the goal of the show's original showrunner, Bryan Fuller. Fuller said that Martin-Green’s character would be a “lieutenant commander with caveats.”Walking Dead fans shouldn't fret, because Martin-Green will still portray her character, Sasha, on the popular show (at least for now … because we all know how they like to kill off people).