Revolutionary Sisters (Korean: 오케이 광자매) is a 2021 South Korean television series starring Yoon Joo-Sang, Hong Eun-Hee, Jeon Hye-bin, Kim Kyung-nam, Go Won-hee, and Lee Bo-hee. Directed by Lee Jin-seo, the weekend drama revolves around Lee sisters, who are suspected of murder of their mother during divorce proceedings of their parents. It premiered on KBS2 on March 13, 2021, and aired on every Saturday and Sunday from 19:55 (KST) till September 18.The series ended on September 18 after 50 episodes. The 49th episode of the series aired on September 12, 2021, logged a national average viewership of 32.6% with 5.8 million viewers watching the episode, it placed the series at 7th rank among 'Top 50 series per nationwide viewers in Korea'.