Missing 9 is a South Korean television series starring Baek Jin-hee and Jung Kyung-ho. It aired on MBC from January 18 to March 9, 2017 on Wednesdays and Thursdays at 22:00 (KST) for 16 episodes.

Jung Kyung-ho is a South Korean actor. He became well known for his supporting roles in I'm Sorry, I Love You (2004) and Time Between Dog and Wolf (2007), and his leading roles in Smile, You (2009) and Heartless City (2013). He has since had leading roles in Beating Again (2015), One More Happy Ending (2016), Missing Nine (2017), Prison Playbook (2017–2018), Life on Mars (2018), When the Devil Calls Your Name (2019), Hospital Playlist (2020–2021) and Crash Course in Romance (2023).