Voice (Korean: 보이스; RR: Boiseu) is a South Korean crime-thriller television series starring Lee Ha-na, Jang Hyuk (Season 1), Lee Jin-wook (Season 2 & 3), and Song Seung-heon (Season 4) which follows the lives of 112 emergency call center and dispatch team members as they fight against crimes using the sounds that they hear. It premiered on OCN on January 14, 2017. The first season concluded on March 12. The second season aired from August 11 to September 16, 2018. The third season aired from May 11 to June 30, 2019. The fourth season was premiered on June 18, 2021, and it aired on every Friday and Saturday at 22:50 KST on tvN till July 31, 2021.