The void left by So Ji-sub's secret agent dad in "Agent Kim Reactivated" has been filled by “killer mom” Gong Hyo-jin, as MBC’s Friday-Saturday drama “A Bona Fide Killer” surpassed a nationwide viewership rating of 10 percent after just six episodes, taking first place in its time slot. Playing a contract killer named “Kingfisher,” Gong's character returns to work as an assassin to target vicious criminals let off with light sentences. Unbeknownst to everyone, “Kingfisher” is actually Yoo Bo-na, a working mom with a 4-year-old daughter. She works on a sales team at Durumi Electronics, which is the front for an organized group of killers specializing in poisoning, stabbing and sniping. Having just returned from parental leave, Yoo Bo-na worries when a nighttime assignment is suggested: “Let’s do it during the day. I have to go pick up my kid.” The drama has drawn praise from critics for its fresh blend of genres, combining the catharsis of punishing villains and the struggle to juggle work and private life with a touching family drama. The premise of a family-orient