Stranger is a South Korean crime thriller drama television series. Produced by Signal Entertainment and IOK Media, it was created by Studio Dragon writer Lee Soo-yeon and broadcast on tvN from June 10, 2017. The series was renewed for a second season, which premiered on August 15, 2020.

Cho Seung-woo is a South Korean actor and singer. He is best known for his leading roles in the films The Classic (2003), Marathon (2005), Tazza: The High Rollers (2006), and Inside Men (2015), as well as in the stage musicals Jekyll & Hyde, Hedwig and the Angry Inch and Man of La Mancha. He is also known for his leading roles in television dramas The King's Doctor (2012), God's Gift: 14 Days (2014), Stranger (2017–2020), Life (2018), Sisyphus: The Myth (2021) and Divorce Attorney Shin (2023).