Undercover is a 2021 South Korean television series directed by Song Hyun-wook and starring Ji Jin-hee, Kim Hyun-joo, Jung Man-sik, and Heo Joon-ho. Based on BBC drama series of the same name, it portrays the story of Han Jeong-hyeon, an agent at the National Intelligence Service, and a Human Rights lawyer, Choi Yeon-soo. It aired on JTBC on Fridays and Saturdays at 23:00 (KST) from April 23 to June 12, 2021. The series is also available on streaming media TVING in South Korea. Kim Hyun-joo and Ji Jin-hee previously starred together in Miss Kim's Million Dollar Quest (2004) and I Have a Lover (2015).

Ji Jin-hee is a South Korean actor. He is best known for his leading roles in the television shows Dae Jang Geum (2003), Spotlight (2008), He Who Can't Marry (2009), Dong Yi (2010), "Second to Last Love (2016), Misty (2018) and Designated Survivor: 60 Days (2019).